NorthStar Navigation 941X manual

North star 941X Re f ere nc e M a nua l SOFTW ARE VERSION 2.05 30 SU DBU R Y ROAD ACTON, MASSACHU SE TTS 01720 (508) 897-6600 Copyrigh t 1994, 1995, 1996 No rthstar Technologies P /N GM1100 Doc. Re v D[...]

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WA RRA NTY North star Tech nologies, a Di vision of CM C E lectroni cs, Inc., war r ant ees its p roduct s to be free from defects in material and workmanship for a period of two (2) years from the date of s hipment to an authorized dealer. This warranty applies to the original pu rchaser or subsequent owner. This w arranty cove rs repair and/or re[...]

IM PORTA NT NOTICE Although Norths tar products are designed to be very usef ul navigation tool s, they are not substitutes for good seamans hip. The prudent navigator should never rely on any single device as the sole source of navigation guidance. Exercise caution and good judgment whenever underway.[...]

! C C C CO NT EN TS ONTENTS ONTENTS ONTENTS ! The Northstar 941X The Northstar 941X The Northstar 941X The Northstar 941X Introduction ................................................................. 2 Upon First Start-up ...................................................... 2 Using This Manua l....................................................[...]

Creating Waypoints and Creating Waypoints and Creating Waypoints and Creating Waypoints and Routes Routes Routes Routes Entering Data .............................................................. 36 Creating Waypoints .................................................... 37 Avoidance Areas ......................................................... 3[...]

Other Special Functions Other Special Functions Other Special Functions Other Special Functions Alarms ......................................................................... 68 Screen Backlighting ..................................................... 7 1 TideTrack™ .................................................................. 71 Internal [...]

Figures Figures Figures Figures F IGU R E 1—M AX . P O S IT IO N V ARIANC E S WITH U NCORRECTED GPS .... 8 F IGU R E 2—Y OKE M OUNT D RI LL ING D IM EN S ION S ........................... 102 F IGU R E 3—R EAR C ONNECTORS ...................................................... 103 F IGU R E 4—941X GPS-O NL Y A NTENNA (A N145 & AN150)....[...]

Rev. D 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Page 1 Introduction 2 Upon First Start-up 2 Using This Manual 3 Features 4 Functions 5 Comparing GPS and L oran 5 Mounting 9 Special F unctions 9 The Di splay S creen 10 Interfacin g Capability 11 his section introduces you to the Northstar 941X n avi- gator, outlini[...]

Page 2 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Rev. D HE NORTHSTAR 941X combines 12-ch annel GPS navigati on with Differential GPS capability, a high-def inition display, loran compati- bility, built-in tide data up to the year 2010, and many other navigation features. For the ultimate in GPS accuracy, the 94 1X [...]

Rev. D 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Pa ge 3 The alarm mess age NO G PS PO SIT ION FIX , al ong with its time and date, are shown in the RE CE NT ALAR M S box. The word NE W in the upper right corner of the box indicates that this is a previously unac- knowledged message. This sequ ence is a normal part[...]

Page 4 1 — In troduction 1 — Introduction 1 — Introduction 1 — Introduction Rev. D Upon using the 941X, you’l l see that you can actually learn to operate the system’s vari ous features with out constant r eferral to this manual. Aft er you’ve read thro ugh it once, yo u won't have to refer to it ve ry o ften again. Since the 941[...]

Rev. D 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Page 5 Five keys on the 941X instant ly select the most commonly used func- tions, as described b elow: POSITION displays posi tion coordinat es as 1) GPS lat/ l on coor dinates 2) loran TDs, i f you h ave a loran receiver in terfaced to the un it 3) or calculated ?[...]

Page 6 1 — In troduction 1 — Introduction 1 — Introduction 1 — Introduction Rev. D from a cha rt or other reference. Repeatable accuracy refers to the ability to return to a position w hose coordinates you have previousl y recorded with the same equipment.) Developed by the United States Depart ment of Defense (DOD) the GPS system of 21 act[...]

Rev. D 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Page 7 “beacons, ” the transmitters are be ing situated at various locatio ns along the U.S. coastline and Great Lakes, most of which a re former marine ra- diobeacon sites.) With DGPS, na vigators are gua ranteed position a ccuracy on the order of 2-5 meters 50%[...]

Page 8 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Rev. D Loran, however, isn’t as prof icient as GPS in absolute accuracy , or visit- ing a spot f or the first time. Since it transmits at a relatively low fre- quency ( 100 kiloH ertz—similar to that on yo ur AM radio), your ability to get an accurate position ?[...]

Rev. D 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Page 9 If you nee d a higher level o f accuracy than what basic GPS provides, there are two ch oices available to you: 1. Use Differentia l GPS by ins talling a Norths tar internal dif ferential beacon rece iver (or use an externall y-located Northstar diffe rential [...]

Page 10 1 — Introduc tion 1 — Introduction 1 — Introduction 1 — Introduction Rev. D real-time loran TDs. These fea tures greatly ea se the transition from using loran to u sing GPS. See pag e 30 for further de tails on us in g loran TDs . The 941X’s plotter provides a picture of your position, and of what is around you. Nearby waypoints, [...]

Rev. D 1 — Introduction 1 — Introduction 1 — Introduction 1 — Introduction Page 11 any oil or grease on the screen. Whenever p ossible, avoid touching the w i n d o w w i t h y o u r f i n g e rs , a s n at u r a l o i l s f r o m y o u r h a n d w i l l t e m po ra r - ily degrade the cha racteristics of th e window and cause your fingerp [...]

Page 12 1 — Introduc tion 1 — Introduction 1 — Introduction 1 — Introduction Rev. D[...]

Rev. D 2 — Using the Controls 2 — Usin g the Controls 2 — Usin g the Controls 2 — Using the Con trols Page 13 POWER Key 14 CONTRAST Key 14 SAVE/MO B Key 15 Function Keys 16 Menu Keys 1 7 Cursor Keys 17 Keypad 17 Special Dis play Windo ws 18 HIS SECTION de scribes each of the Northstar 941X's contr ols. U se this section fo r lear ning [...]

Page 14 2 — Using the Con trols 2 — Usin g the Controls 2 — Usin g the Controls 2 — Usin g the Controls Rev. D H E M A J O R F U N C T I O N S o f e a c h o f t h e 9 4 1 X ' s c o n t r o l s a r e d e - scribed in this section. Press th e POWER s w i t c h b ri e f l y t o t u rn o n t he 9 4 1 X. T he u n it di s p l a y s a special[...]

Rev. D 2 — Using the Con trols 2 — Usin g the Controls 2 — Usin g the Controls 2 — Using the Con trols Page 15 The SAVE/MOB k ey is us ed to sa ve yo ur cu rr en t p os it io n a s a wa yp o in t. It does this in either of two ways, dep ending on whether you pr ess the key briefly, or press an d hold it. Press th e SAVE/MOB but ton briefly [...]

Page 16 2 — Using the Con trols 2 — Usin g the Controls 2 — Usin g the Controls 2 — Usin g the Controls Rev. D To leave MOB mode and return to normal navigation, press SAVE/MOB for at le as t three secon ds. The five functi on keys located b elow the disp lay screen c ontrol wha t the 941X is doing. Any function key may be pressed at any ti[...]

Rev. D 2 — Using the Con trols 2 — Usin g the Controls 2 — Usin g the Controls 2 — Using the Con trols Page 17 The NAV LOG key displays the waypoints yo u have passe d, and all ows you to change those ah ead of you. See “Wh at N AV LOG Does,” on page 64, fo r more informatio n. The five round MENU keys on the right side of the displa y [...]

Page 18 2 — Using the Con trols 2 — Usin g the Controls 2 — Usin g the Controls 2 — Usin g the Controls Rev. D right side of the field. If you make a mistake, you can press CL E AR to clear the entire number and re-enter it, or you can press the left-a rrow cursor key to reenter particular digits , one at a time. When the 941X is expecting [...]

Rev. D 2 — Using the Con trols 2 — Usin g the Controls 2 — Usin g the Controls 2 — Using the Con trols Page 19 Information windows are displayed wh ile you are entering data or using control functions. They give you extra deta ils pertaining to wh at is about to happen, or let you acknowledge a command. Information windows always appea r wi[...]

Page 20 2 — Usin g the Controls 2 — Usin g the Controls 2 — Usin g the Controls 2 — Usin g the Controls Rev. D[...]

Rev. D 3 — Basic Na vigation 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Page 21 Displaying Po sitio n, Heading & Sp eed 22 Position Plotter 22 Using GPS 25 Using Loran 30 Using Ph antom Lo ran 3 2 HIS SECTION describes the most ba sic—yet impor- tant—navig ation function av ailable in the N orth star 941X: deter[...]

Page 22 3 — Basic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D O DISPLAY the coor dinates of your current position, simply press the button marked POSITION . A screen is displa yed showing your position co ordinates at the top, and your Course-Over-Ground (COG) and Speed-Over-Ground (SO G) at the bottom[...]

Rev. D 3 — Ba sic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Page 23 The image of your boat displayed on the screen p oints in the dir ection of your Course-Over-Ground. Remember, this direction may be different from yo ur heading. The bo at image shows your actual direction of trav el over the bottom, no t [...]

Page 24 3 — Basic Navigati on 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D To s et up the parameters fo r the display of data o n the plotter screen, press th e OPTIONS menu key. The following screen is displayed: The plotter control menu allows y ou to change t he following items: • The plo tter scale at and abo[...]

Rev. D 3 — Ba sic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Pa ge 25 You may also choose to freeze th e track, so that no more points will be stored and the track will remain unchan ged. Pressing th e CLE AR TRACK menu key clears the track history displayed on the screen. Press th e RETU RN menu key to go b[...]

Page 26 3 — Basic Navigati on 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D In the center of the screen, th e name of th e datum cur rently in use is dis- played. The datum describes the reference of the char t you are currently using (the reference datum used is indicated on each chart). Applying the datum corrects[...]

Rev. D 3 — Ba sic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Page 27 For f urther information on operating in DGPS mode, ref er to “Internal Differential Beacon Receiver,” o n page 74. With DGPS active, you will o ften see position meas urements accurate to about 2-5 meters, speed measurem ents accurate [...]

Page 28 3 — Basi c Navigation 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D The following GPS data is also displayed: ACCURACY ACCURACY ACCURACY ACCURACY: The estimated a ccuracy of the GPS system to be expected at the curre nt time. Your position readings shoul d be more ac- curate than this estimate 95% of the tim[...]

Rev. D 3 — Ba sic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Page 29 The lower par t of the screen sh ows three bar gr aphs: 1. SNR SNR SNR SNR The Signal to Noise Rati o (SNR) is a good overall measur e of overall signal quality, an d should be as high as possible. Values of 15 and higher ar e pr eferr ed, [...]

Page 30 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D MESSAGE MEANING OLD CORRECTIONS No DGPS corrections hav e been received within the DGPS DATA TIM EO UT limit set in RECE IVER OPTIONS (default is 1 min- ute), and the navigator has returned to non- differential operation. See “G PS data tim[...]

Rev. D 3 — Ba sic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Page 31 4. Press the up and down cursor arrow keys to display EXT ERN AL LRN as the position source. If you change your mind, press CL E AR to restore the original setting; otherwise, press ENT ER, then the RETU RN menu key. The loran d isplay scr [...]

Page 32 3 — Basic N avigation 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D INDICATOR MEANING SNR Signal-to-Noise Ratio is low —use caution BLNK Coast Guard is transmitting a blink signal indicat- ing a probable transmitter problem CYC the receiver has detected a possible cycle slip LOCK the receiver has locked on[...]

Rev. D 3 — Ba sic Naviga tion 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Naviga tion Page 33 ber, however, that these calculated TDs will not match exactly the posi- tions of previously recorded TD coordina tes obtained dir ectly from a c- tual loran signals. In most areas, error s should not exceed 0.2 microsecond. However, larger[...]

Page 34 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navigation 3 — Basic Navi gation Rev. D Press th e L/L TDS menu key several times t o select the par ticular pair of TDs you wish to use o r to display GPS latitude/longitude. Press th e SET GR I m en u k ey to ch an ge the GR I t o b e u se d i n ca lc ul at in g the displayed TDs[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp o ints and Rout es Page 35 Entering Data 36 Creating W aypoint s 37 Avoidance Are as 39 Waypoint Lists 41 Coordinate Options 42 Updat ing Waypo int Coo rdinat es 42 Editing Waypoints 43 Transferri ng Waypoi [...]

Page 36 4 — Creating Waypoi nts and Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D Before we move on to the sections describing how to enter waypoints and routes into the 941X’s memory, let’s take a br eak and review th e methods for ente rin g data into the u[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp o ints and Rout es Page 37 4. String these waypoints to gether to form routes 5. Follow these routes 6. Edit or er ase waypoi nts or routes 7. Plot waypoint s or routes 8. Transf er waypoint s and ro utes fr[...]

Page 38 4 — Creating Waypoints and Rou tes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D Waypoint coor dinates can be enter ed as lat/lon coordinates, loran TDs, or as distance and beari ng from your pr esent location or fr om any way- point in the 941X’s memory. T o [...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp o ints and Rout es Page 39 I f th i s n ew w ay po i n t i s t o b e u s ed as t he c e n te r o f a n avoidance area , en- ter the warning ra dius at the bottom of the screen in the WARN RA DIUS box. If no [...]

Page 40 4 — Creating Waypoints and Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D As a precaution , once you have designated a waypoint as an avoidance area, the 941X does not a llow you to navigate to it. Once yo u have de signated a waypo int as an avoidanc e ar[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Waypo ints and Route s Page 41 Waypoints contain ed in your 941X can be displayed in any of four ways. Press th e WAY PTS / RO U TE S function key, then the WAY PT L IS T menu key to display waypoin t lists. Use [...]

Page 42 4 — Cr eating Waypoints and Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D All saved waypoi nts (stored by pressi ng the SAVE/MOB button, an d h a v i n g a n a m e s u c h a s – S 0 0 1 – ) a r e l i s t e d i n o r d e r o f t h e t i m e a t w h i c[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Waypo ints and Route s Page 43 To update a waypoint’s coordinates, first sail to the s pot where the way- point will be loca ted. Pr ess WAY PTS / R OU TE S , then th e WAY PT L IS T menu key, to displa y a lis[...]

Page 44 4 — Creating Waypoints and Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D If you store a large number of waypoints or r outes in the 941X, or if your waypoint s are th e only records y ou have of i mporta nt locat ions, you s h o u l d c o n s i d e r m a [...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Waypo ints and Route s Page 45 Press th e NE W m e n u k e y . A s c r e e n i s d i s p l a y e d a s k i n g y o u t o e n t e r t h e name of the new rout e. Enter the name o f the new ro u te using the ke ypa[...]

Page 46 4 — Creating Waypoints and Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D To add waypoints to the route, p ress the INSE RT menu key. A list of stored wayp oints is displa yed. Scroll the waypoint l ist up or down using the curso r keys to designate the de[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Waypo ints and Route s Page 47 As w aypoints are entered, the dis tance and bearing o f each leg of your route are displayed on the NE W ROUTE screen. To see an overh ead plot of the entire route, press th e QU I[...]

Page 48 4 — Creating Waypoints and Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D Press th e SAVE menu key on the lower right of the display to instruct the 941X to begin saving a route a utomatically. A scr een is displayed asking you to enter the name of the new[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Waypo ints and Route s Page 49 As you pass the location of each new waypoint, pr ess the SAVE/MOB key to the left of the dis play (not the SAVE menu key in the lower right of the screen). The boat's location[...]

Page 50 4 — Creatin g Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D To make a change to a route stored in the 941X's memory, use the EDI T ROUTE function. Press WA Y PTS / RO U TE S and then the ROUTE LIST menu key to display the ROUTE S scree[...]

Rev. D 4 — Creating Waypoints a nd Routes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp o ints and Rout es Page 51 To insert a new waypoint, use the up and down cursor keys to move th e pointer to the spot between the two ex isting waypoints where you wa nt to make the inser tion, and press th [...]

Page 52 4 — Creating Waypoi nts and Rou tes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes 4 — Cre ating Wayp oints and Ro utes Rev. D To plot an overhead view of th e route, pr ess the QU ICK PLOT menu key.[...]

Rev. D 5 — Waypoint a nd Route Nav 5 — Waypoin t and R oute Nav 5 — Waypoin t and R oute Nav 5 — Waypoin t and R oute Nav i i i ig at io n gation gation gation Page 53 Quick-Star t Waypo int 54 Navigating to Wa y points 55 Navigating Al ong Routes 59 Restart ing the Co urse Line 61 In this section, we’ll begin navigating to specific waypo[...]

Page 54 5 — Waypoi nt an d Route Navigati on 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoin t and Rou te Navigati on Rev. D he 941X’s “Quick Waypoint” feature allows you to enter coordinates and start navigating in one quick and easy sequence. Press th e WAY P TS /R OU TE S key, and then press the[...]

Rev. D 5 — Waypoi nt and Rout e Navigation 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoint a nd Route Navi gation Pa ge 55 To navig ate to a waypoint alre ady stored in the 94 1X, first display it us- ing one of the four way point list scr eens: pr ess WA Y PTS / ROU TES , then the WAYP T LI ST menu key[...]

Page 56 5 — Waypoi nt and Rou te Navigati on 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoin t and Rou te Navigati on Rev. D The first ST EERIN G screen is a tra ditional di splay showi ng cross-trac k distance at the bottom of the screen (h ow far off your intended course line you may be) combined with [...]

Rev. D 5 — Waypoi nt and Rout e Navigation 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoint a nd Route Navi gation Page 57 3 3 3 3 In the first steering screen ab ove, a line extends from the data box in the center of the screen to a menu key. Each press of the menu key changes the data displayed in th e[...]

Page 58 5 — Waypoint an d Route Navigati on 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoin t and Rou te Navigati on Rev. D Two vertical lines near th e edge of the screen indicate th e limits of off- course distance. An alert message will be given if th ese limits are ex- ceeded, and the image of your b[...]

Rev. D 5 — Waypoi nt and Rout e Navigation 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoint a nd Route Navi gation Page 59 To follow a route that has been stored in the 941X’s memory , press the WAY PTS / RO U TE S key, then the ROU T E LIST menu key. Use the cur- sor keys to select th e route you wish[...]

Page 60 5 — Waypoint a nd Route Naviga tion 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoin t and Rou te Navigati on Rev. D changes to a connecting arro w between the two waypoints , as in screen #2 above. Press th e GO menu key, then ENT ER . To start followi ng the rout e, select the wa ypoint or leg y[...]

Rev. D 5 — Waypoi nt and Rout e Navigation 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoint a nd Route Naviga tion Page 61 The distan ce and bearing of each leg are displaye d near the center of the screen. To display the coordinates of each waypoint in place of th e name and de- scription, p ress the NA[...]

Page 62 5 — Waypoint and Route Na vigation 5 — Waypoin t and Rou te Navigati on 5 — Waypoint a nd Route Navi gation 5 — Waypoin t and Rou te Navigati on Rev. D If you do not need to return t o the original course line, you can continue directly to the w aypoint (Co urse 2) usin g the restart fun ction described below. To restar t your cours[...]

Rev. D 6 — Th e NAV LO G Function 6 — The NAV LOG Func tion 6 — The NAV LOG Func tion 6 — The NAV LOG Funct io n Page 63 What NAVLOG Does 64 Logging Your Trip 65 Changing Your Trip 65 Adding W aypoints to th e Trip 66 The Northstar 941X’s NAV LOG function provides a q uick and easy way to chec k on your pr ogres s along a tr ip, and to ma[...]

Page 64 6 — The N A V L OG Function 6 — The NAV LOG Func tion 6 — The NAV LOG Func tion 6 — The NAV LOG Func tion Rev. D HE Norths tar 941X’s NAV L OG feature hel ps you plan and l og your trip. It contains the actual series of waypoints that you follo w along your route. When you navigate to a waypoint or along a route from the 941X’s [...]

Rev. D 6 — The NavLog Fun ction 6 — The NavLog Functi on 6 — The NavLog Functi on 6 — The NavLog Function Page 65 You can re verse the trip at any time (n avigating to route w aypoints in reverse o rder) by pressin g the RE VERS E menu key. Waypoints may be added to the trip by pressing the APPE ND WAYPT menu key. Any waypoints a dded to th[...]

Page 66 6 — The N AV LOG Function 6 — The NAV LOG Func tion 6 — The NAV LOG Func tion 6 — The NAV LOG Func tion Rev. D Under NAV LOG , the distan ce and bearing of e ach leg are displayed. You can easily read th e direction of the next leg of your trip from th is display. Press th e NAV LOG key to display the waypoints o f your current trip[...]

Rev. D 7 — Other Speci al Functi ons 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Fun ctions Page 67 Alarms 68 Screen Bac klight ing 71 TideTrack™ 71 Internal Differential Beac on Receiver 74 This sect ion cov ers several sp ecial func tions that enable you to: chang e the 941X’ s audib le alarms and sc[...]

Page 68 7 — Othe r Special Functions 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Functi ons Rev. D everal special 941X functions ar e controlled by the STAR function key ( ). These in clude alerts and alarms , TideTrack™ function s, and setup fun ctions. The Northstar 9 41X has a nu mber of automatic ala[...]

Rev. D 7 — Other Specia l Function s 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Fun ctions Page 69 Though mos t alarm conditions are “auto clearing” af ter approximately five seconds, and do n ot require any user action , two alarms— AVOIDAN CE ARE A and ANCHOR WA TCH —must be acknowledged before [...]

Page 70 7 — Other Spe cial Functio ns 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Functi ons Rev. D When ALARM AU DIO is set to ON, the 941X will audibly alert you to any of the al arm conditions turned ON at the ALARMS & BACKLIGHT screen. The anchor watch fe ature of the 94 1X will so und an alarm if [...]

Rev. D 7 — Other Specia l Function s 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Fun ctions Page 71 The ARRIVE RADIUS alarm sig nals you when you come w ithin a speci- fied distance of the next waypoint. You ca n specify the distance of th e radius around wa ypoints down to 0.01 nm. 1. If yo u want to chan[...]

Page 72 7 — Other Special F unc tions 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Functi ons Rev. D displayed for a ny date from 1994 t o 2010. Data is fr om the officia l tide table pre dictions an d should be as accurate as the printed tables. (Pl ease refer to Tide Tables , published b y the N OS/NOAA, [...]

Rev. D 7 — Other Specia l Function s 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Fun ctions Page 73 To choos e a nearby tide station , press the CONFI G key while viewing the TIDE TRA CK screen. Press th e CHOOSE CLOSES T T IDE S TATION m e n u k e y . T h e 9 4 1 X will search for th e nine closest statio[...]

Page 74 7 — Othe r Special F unctions 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Functi ons Rev. D Use the up or down cursor arrow ke ys to point to the desired waypoin t, and press ENT ER . The 941X will search for, and pr esent, th e nine closest tide stations to this waypoint. Now, use the up and down [...]

Rev. D 7 — Other Specia l Function s 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Fun ctions Page 7 5 These corrections ar e used by your 941X to imp rove its p osition accura cy to 10 meters—or better—w ith 2-5 meters accuracy commonly availabl e. Differential corr ections are invalua ble when navigat [...]

Page 76 7 — Othe r Special F unctions 7 — Other Special F unc tions 7 — Other Spe cial Functio ns 7 — Other Speci al Functi ons Rev. D ual mode, the bea con receiver wi ll output DGPS cor rections only from the selected station. Though the need for manual opera tion is rare, it is easily accessed from y our 941X keypad. To man ually choo se[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizin g the 941X Page 77 Time of Day 78 Display Options 78 Navigation O ptions 82 Port Setup Options 90 Service O ption s 91 Geodetic Datum 94 his s ection exp lains the v ariou s opt ions av ailable t o yo u for customizing the way your 941 X disp[...]

Page 78 8 — Custom izing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D Press th e STA R key until yo u display the TIM E OF DAY scr een. The time, date, local time zone, and time of today’s sunrise and sunset are shown. Also displayed is the current time expressed as “GMT” (Greenwich M e[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing t h e 941X Page 79 To change any of the options (described b elow), select it by using t he cursor keys to move the arr ow at the left of the screen, and th en press the ED IT menu key. Th e field will begin to fla sh, waiti ng for you to ch[...]

Page 80 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D (DISPLAY OPTI ONS) (DISPLAY OPTI ONS) (DISPLAY OPTI ONS) (DISPLAY OPTI ONS) Time of day may be displayed in either 12- or 24-hour format. Th e option you select her e affects all of t he 941X’s tim e-related d isplays, i n[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 81 To change the maximum saved waypoint number: 1. Move the cur sor to this op tion and pr ess the ED IT m e n u k e y . T h e cursor will begin to flash in the firs t digit field. 2. Using the numeric keypad, enter the value y[...]

Page 82 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D Press th e RE TURN menu key to return to the US E R CU STOM IZATION screen. The following options contr ol aspects of navi gation and t he use of GPS and Differential GP S. Press the STA R key until you display the USER CUS [...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 83 • GPS can be selected as the navigation source at any time. • EXTERNAL LORAN can be used if a loran receiver is interfaced to the 941X (and is operational). • PHANTOM LORAN can be used if no loran receiver is inter- fa[...]

Page 84 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D Press EDI T to change the 941X’s magn etic variation setting. Use the up/down cursor keys to ch oose AUTO, MAN UAL or TRU E. When choosing MANUAL, move the cursor to the r ight to enter the va lue you want. Pr ess ENT ER w[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 85 The ARRIVE RADIU S factory default i s 0.02 naut ica l miles (ap pr ox. 12 0 ft.). To change it: 1. Press th e STA R key to display the ALARM S & BACKL IGHT screen. 2. Move the cursor arrow do wn to ARRIVE RADIUS and pre[...]

Page 86 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D The options repr esent the entire distance limit on your screen, fr om complete left to complete right. Therefore, a cross-track distance setting of 1,000 feet will display 500 feet to either side o f your track line, while [...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 87 To change the STEER DI ST PR ECI SIO N option, press the ED IT menu key and use the up/down cursor keys to scroll a mong the choi ces of HIGH or NORM AL . Press ENT ER when you are done, or CLE AR to leave the option uncha n[...]

Page 88 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D To change the speed a veraging value: 1. Move the cursor arrow in fr ont of the GP S SP EED AV ERA GIN G option and p ress the EDI T menu key. 2. Use the up/down cursor keys to select an aver aging time of two t o 10 seconds[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 89 (RECEIVER OPTIONS) (RECEIVER OPTIONS) (RECEIVER OPTIONS) (RECEIVER OPTIONS) This setting determines how long the 941X will continue to use existing DGPS corrections if no new corrections are being received (due to bad weathe[...]

Page 90 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D A f t e r t h i s “ t i m e o u t ” p e r i o d e l a p s e s w i t h n o D G P S d a t a h a v i n g b e e n r e - ceived, the 9 41X will revert to navigating with normal GPS, the DGPS display indicator (shown at left) [...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 91 Refer to “Pro gramming the Output Po rts,” on page 115, for detailed in- formation o n how to inte rface your 941 X with other equipme nt. To view your 941X’s serial number a nd hardwa re specifica tions, pr ess the ST[...]

Page 92 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D (SERVICE INFORM ATION) (SERVICE INFORM ATION) (SERVICE INFORM ATION) (SERVICE INFORM ATION) This number indicates the revi sion level of your 941X’s oper ating soft- ware program. (SERVICE INFORM ATION) (SERVICE INFORM ATI[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 93 the message FAIL ED is displayed, return the 941X to the facto ry for service. (SERVICE INFORM ATION) (SERVICE INFORM ATION) (SERVICE INFORM ATION) (SERVICE INFORM ATION) A built-in test feature allows yo u to verify the int[...]

Page 94 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D Differe nt regions o f the world us e various mode ls for lat/lo n coordinates on their charts, called “datum.” You shou ld always be s ure that your 941X is using the same datum as your charts. Press th e STA R key unti[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 95 AB4 Astro B4 Soro l Atoll ( Hawai ian Island s) INTL 114 -116 -3 33 AD71 4 Astro D os 71/4 (Atlantic I sl.) IN TL -320 550 -494 AS52 Astro nomi c Stati on 1952 INTL 124 -234 -25 AG66 Au stralian Geodeti c 1966 AUS TR -133 -4[...]

Page 96 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D NAH_O Nahrwan—Masi rah Island (Oman) CL1880 -247 - 148 3 69 NAH_UA Nah rwan—U nited A rab Emirates CL1880 -249 -156 381 NAH_SA Nah rwan— Saud i Arabia CL1880 -23 1 -196 482 NAP Naparima BWI ( Trinid ad and To bago) INT[...]

Rev. D 8 — Customizing t he 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing the 941X Page 97 SA69_AG Sou th A merican 1969—Argentin a SA1969 -62 -1 -3 7 SA69_BO Sou th A merican 1969— Bolivi a SA1969 -61 2 -48 SA69_BR South Americ an 1969—Brazil SA1969 -60 - 2 - 41 SA69_CH South Ameri can 1969—Ch ile S A1969[...]

Page 98 8 — Customizing the 941X 8 — Customizing th e 941X 8 — Customizing th e 941X 8 — Customizing th e 941X Rev. D[...]

Rev. D 9 — Installati on and In terfa 9 — Installation and Interfa 9 — Installation and Interfa 9 — Installation and Interfac c c cin g ing ing ing Page 99 Mounting the 941X 100 Wiring the 941X Sy stem 102 GPS A ntenna Lo catio n 104 DGPS Antenna Coup ler (ACU ) 108 Interfacin g the 941X 112 Programming the O utput Ports 115 RS-232 P ort 12[...]

Page 100 9 — Instal l ation and Inter facing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Proper installation of your Nort hstar 941X receiver is of ut most impor- tance to accurately receive a nd effectively use GPS signals under a wide variety of w eather condition s. To g[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 101 The shippi ng carton conta ins the following components: • the 941X • GPS antenna • 25’ coaxial antenna cable (for pass ive-patch antennas; 50’ sup- plied with optio nal active-patc[...]

Page 102 9 — Installation and I nterfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D wipe the unit dry, especially the rear connector s. When not in use, cover the 941X with the sunshi eld to protect it from excessive hea t. Figure 2—Yoke Mount Drilling Dimensions Your [...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 103 We strongly recommend (a s a good safety pract ice) th at y our 941X be connected to an external circuit brea ker or fuse located nea r the battery or breaker box . The internal fuse is desig[...]

Page 104 9 — Install at ion and Interfac ing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Three anten nas choices are available fo r your 941X: two for reception of GPS-only signals (standard #AN145 and “active” # AN150), and one to receive both GPS an d D GPS signals (#[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 105 O-R IN G ADAPTER ANTE NNA 3. 00 . 91 1. 82 CAPTIVE SCREW Figure 4—941X GPS -Only Antenna (AN145 & AN150) 7. 00 2. 5 3. 5 TNC Figure 5—941X Combo GPS /DGPS Antenna (AN190) Tools needed[...]

Page 106 9 — Install at ion and Interfac ing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D 1. R emove the antenna base by loosening the four cap tive screws in the base. 2. Screw the base onto the top of the antenna moun t (standard 1"- 14 marine thread) . 3. Feed the op[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Pag e 107 without apprecia ble signal loss. However, the splitter is not weather proof and should be placed in a pr otected ar ea wh ere it will not be subjected to direct wat er splash or spray . The[...]

Page 108 9 — Installation and Interfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D 3) Place center con tact onto center co nductor so that it butts against the cable dielectric. Crimp th e contact in place using Amphenol tool h an- dle #227-944 and Cavity B o f Die Set 2[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 10 9 is molded into the l ower portion, or base, of the ACU body into which the u p p e r h al f i s s e c u r e d (s e e F i gu re 9 o n p a g e 1 1 0 ) . T h e b o t t o m o f t h e b a s e is [...]

Page 110 9 — Installat io n and Interfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Figure 9—ACU Assembly WA RNING WHENEVER ANY A NTENNA IS DISCONNECTED FROM ON-BOARD EQUIPMENT, BE SURE TO GROUND THE ANTENNA SHIELD IN ORDER TO DISCHARGE EXTREMELY LARGE STATIC VOLTAGES[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 111 Both ends of the differential bea con receiver antenna cable terminate in UHF con nectors. Follow the assembly ins tructions in Figure 10 for pre- paring U HF connectors. For b est results, c[...]

Page 112 9 — Installat ion and Interfac ing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D The Northstar 84 10 differen tial beacon rece iver antenna s hould be mounted as high as conveniently possible (but not at the highest point) and as far away as poss ible from o ther ant[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 113 The 941X has t wo pr ogra mmab le NM EA i nput /outp ut p orts a nd one R S- 232 input/output port that yo u can customize for outputting data to other instru ments, and two ports for inpu tt[...]

Page 114 9 — Install ation and Inter fac ing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Description Wire Color Pin NMEA PO RT 1 INPUT A BROWN 3 NMEA PO RT 1 INPUT B BLUE 1 NMEA PO RT 1 INPUT G ROUND W HITE w/BLU E STRIPE 4 NMEA PO RT 1 OUTPU T A VIOLET 12 NMEA PORT 1 OUT P[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 115 Figure 12—200 PPN M Output Block Diagram Each output port can be programmed to meet most any special require- ments of devices that conform to the NMEA 0183 data format specifica- tion. The[...]

Page 116 9 — Instal l ation and Interfac ing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Check the installation instr uctions for the equip ment to wh ich you are interfacing for any special requirements . The Northstar factory settings will be adequate for most periphera l[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 117 (NMEA) 0180 0180 0180 0180 is an infrequently-used format, developed in the late 1970’s and is required by many ol der auto pilots. 0183 0183 0183 0183 V2. 1 is the most po pular interfacin[...]

Page 118 9 — Installation and Int e rfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D input to the 941X, the checksum is ignored. (It should be noted that, with the checksum ignored on input, there is a possibility of the 941X receiv- i n g c o n t a m i n a t e d N M E A[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 119 will be output are follow ed by the word ON. Thos e that will not be output are followed by two dashes, signifying th at they are tur ned OFF. 1. Move the cursor arrow to the sentence you wis[...]

Page 120 9 — Installatio n and Interfac ing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D The meaning of the NM EA 0183 three-letter identifier s are: 0183 IDENT IFIER MEANIN G APB Autopilot Sentence “B” BOD Bearing to Destination BW C Bearing & Distance to W pt. (Gre[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 121 the listener device is expecting. Check th e listener device’s instruction manual to determine which “talker ID” codes it will respond to. Use the EDI T menu key, then s croll through t[...]

Page 122 9 — Installation and Inte rfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D function with two-place precision. R efer to the manufa cturer’s instr uc- tions fo r how many digits of precision are required for that particular device. (PORT 1 / PO RT 2 SETUP) (POR[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 12 3 If you pre sently ow n a Northstar 800 serie s loran, yo u may conne ct it to y o u r 9 4 1 X t o s e r v e a s a n i d e a l s o u r c e o f L o r a n - C T D s a n d p r e v i o u s l y - [...]

Page 124 9 — Installation and I nt e rfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Interfacing to other de vices requires s lightly diffe rent pin/wire co nnec- tions. For example, use th e following table to enable the 941X to com- municate with a Yeo man electron ic[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 125 8800 DGPS Sensor 941X Interface Connector Pin 21 (receive) red (RS-232 output) #18 Pin 20 (transmit) green (RS-232 input) #16 Pin 17 (ground) tan (RS-232 ground) #17 8400 beacon receiver 941X[...]

Page 126 9 — Installation and I nterfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D Use this same EDI T pro cedure to set the baud rate to match that of the external device, if necessary. (R efer to the externa l device’s instructions for correct baud rate setting.) Th[...]

Rev. D 9 — 9 — 9 — 9 — Installation and Inter facing Installation and Interfac ing Installation and Inte rfacing Installation and Interfacing Page 127 The COPY PORT fu nction enable s you to interface the 941X to many Personal Co mputers without the need fo r an RS-422-to-RS-232 con- verter. Many PC appl ication programs for waypoin t/route[...]

Page 128 9 — Installation and Int e rfacing 9 — Installat io n and Interfac ing 9 — Inst al lation and Inter facing 9 — Installation and Interfacing Rev. D[...]

Rev. D Appendix Appendix Appen dix Appendix Page 129 A PPENDIX Northstar 941X Sp ecifi cations Position Data Position Data Position Data Position Data • Latitude/longitude (158 datums) from GPS with 1-second updates • Phantom Lo ran-C TDs (cal culated from GPS) Loran-C TDs (from your e xisting loran : 1 second from Northstar 800 s eries, 2 seco[...]

Page 130 Appendix Appendix Appen dix Appendix Rev. D Waypoint & Route Management Waypoint & Route Management Waypoint & Route Management Waypoint & Route Management • Avoidance Waypoints • Enter wpts as lat/lon, distan ce and bearing, or l o ran TDs • Displays 30 cl o sest waypoints • Store 1,000 waypoints • Store up to 50[...]

Rev. D Appendix Appendix Appen dix Appendix Page 131 • Time To First Fix: 30 seconds (typical) • Dynamics: Velocity: 1800 km/h • Acceleration: 4m/sec; Jer k: 2m/sec 2 • Operating Mo des Operating Modes Operating Mode s O p e r a t i n g M o d e s : 2 D N a v , 3 o r m o r e s a t e l l i t e s ; 3 D N a v , 4 o r m o r e satellit es visible[...]

Page 132 Appendix Appendix Appen dix Appendix Rev. D Figure 13—941X Dimensions Dimensions[...]

Rev. D Appendix Appendix Appen dix Appendix Page 133 Signal Pro cess ing Signal Pro cess ing Signal Pro cess ing Signal Pro cess ing • Number of Channels: 2 • Freque n cy Range: 283.5–325. 0 kHz • Tuning Resolution: < 2 Hz • Minimum Signal Strength: 1µV/m @ 100bps • Dynamic Range > 100 dB • Adjacent Channel Rej ection: > 5 0[...]

Page 134 Appendix Appendix Appen dix Appendix Rev. D • Frequ ency: 1575 MHz ±2 MHz • Finish: Outdoor Weat herable P olymer • Polarizatio n: R ight-Hand Circul ar • Weight: 22 Ounces • Axial Rati on 3 dB M ax. • Altitude: 12,000 Feet • Nois e Figure: 2.5 dB Max. • Temperature: -40º C to +70º C • Impedance: 50 Ohm • VSWR: <2[...]

Rev. D Glossary Glossary Glossary Glossary Page 135 GLOSS A RY accuracy accuracy accuracy accuracy: absolute accuracy —the ac curac y of displa yed la t/long c oordi- nates of your pres en t position as compared to l at/long determined from a cha rt or oth er reference sour ce. repeatable accuracy —the ability to return to the same location usi[...]

Page 136 Glossary Glossary Glossary Glossary Rev. D ETA ETA ETA ETA: Estimated Time of Arrival a t the next waypoint, as calcula ted by the 941X according to your present speed of advance (SOA) and distance to the waypoint. ETE ETE ETE ETE: Estimated Time Enroute to the n ext waypoint, as calculated by the 941X according to your present speed of ad[...]

Rev. D Glossary Glossary Glossary Glossary Page 137 tion an d uses it to display bearings as magnetic north. The varia- tion at any location ch anges slowly over a period of yea rs, and the 941X compensates, according to the current calendar year. master master master master: The one loran transmitter in a “chain” o f at least thre e stations w[...]

Page 138 Index Index Index Index Rev. D INDEX INDEX INDEX INDEX A absol ute accur acy......................................................... See accuracy, absolute ACCURACY repeatable ........................................................................135 ACCURACY absolu te .....................................................................[...]

Rev. D In dex Index Index Index Page 139 COG .................................................................................................22, 23, 104 contra st ......................................................................................................... 14 COPY POR T function .........................................................[...]

Page 140 Index Index Index Index Rev. D checking status ............................................................ 32, 34 comparin g to Lor an ......................................................... 5, 7 conv erting co ordin ates from Lor an TDs ............................ 42 conv erting co ordin ates to Lo ran TDs.............................[...]

Rev. D In dex Index Index Index Page 141 LORAN absolu te accur acy ............................................................... 8 comparin g to GPS............................................................... 5 conv erting TD s to lat/lon ................................................... 42 displa ying TD s ..................................[...]

Page 142 Index Index Index Index Rev. D ove rview............................................................................ 90 programming the ports ............................................. 115, 125 RS-232 port .....................................................................126 POSITION ke y .............................................[...]

Rev. D In dex Index Index Index P age 143 SOG ........................................................................................................ 22, 23 STAR key ..................................................................... 5, 1 6, 30, 33 , 68, 76 , 82 STEER key ..........................................................................[...]

Page 144 Index Index Index Index Rev. D removi ng from a r oute ....................................................... 51 save d as you trave l ......................................................42, 49 savin g as par t of a ro ute...............................................44, 49 switch ing to ne xt ( auto) ..................................[...]