Garmin GPSMAP 235 manual

GPSMAP 235 Sounder TM O WNER’S MANU AL AND REFERENCE 19000138.10A.QXD 11/11/99 8:46 AM Page 1[...]

Software Version 4.01 or above Internal Database Version 3.00 © GARMIN Corporation G-chart TM cartridge data is copyrighted by Navionics Corporation and GARMIN Corporation and may not be copied or used for any other purpose without permission. © 1999 GARMIN Corporation GARMIN International, Inc. 1200 E. 151st Street, Olathe, KS 66062, USA Tel: 91[...]

i INTRODUC TION W arning GARMIN, GPSMAP, G-chart, AutoLocate, TracBack and PhaseTrac12 are trademarks of GARMIN Corporation and may only be used with permission. All rights are reserved. The GPSMAP 235 Sounder should not be used as a navigational aid or depth sounder to prevent collision, grounding, or boat damage, any of which could result in pers[...]

The GPS system is operated by the United States government, which is solely responsible for its accuracy and maintenance. The system is subject to changes which could affect the accuracy and performance of all GPS equipment. Although the GARMIN GPSMAP 235 Sounder is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misint[...]

iii INTRODUC TION Sounder Capabilities Designed for detailed electronic charting and complete depth sounding capabil- ity , the GARMIN GPSMAP 235 Sounder is a powerful navigation device that also gives you the fishfinding information you need in fresh or saltwater . Precision Perfor mance: • High-contrast, four -level gray , LCD screen • 12 cha[...]

iv INTRODUC TION Warranty Limit ed W arr anty GARMIN warrants this product to be free from defects in materials and manu- facture for one year from the date of purchase. GARMIN will, at its sole option, repair or replace any components which fail in normal use. Such repairs or replace- ment will be made at no charge to the customer for parts or lab[...]

v INTRODUC TION Preface Congratulations on choosing one of the most advanced depth sounding and marine navigation systems available. The GARMIN GPSMAP 235 Sounder com- bines the proven performance of GARMIN GPS, powerful G-Chart electr onic charting, and full featured depth sounding into one unit to create an unsurpassed marine navigation and fishf[...]

INTRODUC TION Packing List vi Before installing and using with your sounder , please check to see that your package includes the following items. If any parts are missing, please contact your GARMIN dealer immediately . *Standard Package: • GPSMAP 235 Sounder • External GPS Antenna and 30’ cable • Power/Data Cable • Mounting and Gimbal Br[...]

vii GETTING S T AR TED Table of Contents Warning ..................................................................................................................i Cautions .................................................................................................................ii Capabilities/Warranty ......................................[...]

viii INTRODUC TION Keypad Usage The GPSMAP 235 Sounder’s advanced keypad system is designed to allow for fast, con- venient selection of navigation options and data entry. The getting started tour will introduce you to the keypad and provide a ‘hands-on’ lesson in using the sounder. We strongly encourage you to take the getting started tour b[...]

1 GETTING S T AR TED Initialization Initializing the Receiver Before you use your GPSMAP 235 for the first time, you’ll need to “initialize the receiver .” Initialization is the process in which the r eceiver collects satellite data and establishes its (your) present position. Follow the initialization pr ocess described below , which will us[...]

AB Initializing the Receiver (con’t.) The Map Page will appear , prompting you to select your appr oximate present posi- tion with the map cursor . 1. Use the R keypad to move the map cursor to a location close to your present position. If you have difficulty identifying your exact position, use the I key to zoom to a lower map scale. 2. Press T [...]

A B Getting Started T our The GARMIN GPSMAP 235 Sounder is a powerful electronic navigation and depth sounding system that provides detailed chart coverage and convenient con- trol of many advanced featur es right from the screen display . This tour is designed to take you through the basic pages and functions of the system using the simula- tor mo[...]

A B Status Page The Status Page provides a visual r eference of satellite acquisition and receiver status, with a signal strength bar graph and a satellite sky view in the center of the page. Each page of the sounder features an options menu, which gives you access to other functions and features that relate to the specific page you ar e viewing. T[...]

5 GETTING S T AR TED Page Sequence/Position Page The satellite Status Page is one of five main pages used in the sounder . All five pages are linked together in a simple chain, which allows you to scr oll through the pages in either direction using the J and Q keys. T o continue the tour , let’ s move on to the next page, the position page. To sc[...]

6 GETTING S T AR TED Using the GOTO Key AB Marking a Position To mark your present position: 1. Press the M key. The mark position page will appear, with a default three-digit waypoint name, symbol, position, and depth. 2. Use the R keypad to highlight the waypoint name field (001) and press T . 3. Press the LEFT ARROW of the R keypad to clear the [...]

Sounder Page The Sounder Page lets you use the GPSMAP 235 as a fishfinder . The top of the screen contains any of seven selectable data field options, while the middle of the page contains a right-to-left moving sonar image of the water beneath your boat. (Note: Items appear on the screen as they pass under your transducer . Those objects appearing[...]

Range Modes The unit uses three range modes on the Sounder Page: auto, manual, and win- dow . Auto mode displays the most information possible while continuously showing the bottom. Manual mode lets you select the displayed depth. Window mode allows you to define a starting depth and length of the range window ,. but must be started from the sounde[...]

Zoom Feature The zoom feature allows you to view a smaller portion of the complete range in greater detail. The zoom feature operates in auto or manual mode. Auto zoom will follow the bottom contour while manual zoom will display the selected depth. For more on the zoom feature, see pages 26-27. To use the zoom feature: 1. While viewing the Sounder[...]

Map Page The Map Page combines digital chartplotting with a user -selectable display of navigation data, and a built-in worldwide database. It will also be the page you use most to create and edit waypoints and r outes. Before we take off on a practice r oute, let’ s take a brief look at its various features and displays. The map display , locate[...]

Using the Map Cursor The cursor is an important tool that can be used to pan to other map locations, mark and edit waypoints and routes, and r eview position data of on-screen navaids and waypoints. T o get a feel for using the Map Page and cursor , try the following exercise: 1. Use the H key to set the map scale to the 64 nm setting. Your boat sh[...]

Going to a Destination GPS is all about marking positions as waypoints and navigating to them using the receiver’ s steering guidance and map displays. W e’ve already seen how to use the M key to store our present position, so it’ s time to move on to the fun part— going to a destination. The G key , located on the left side of the keypad a[...]

Going to a Destination (con’t.) A data field at the top of the page will now display the bearing and distance to the second route waypoint. T o get started, let’ s enter a speed for our vessel, which we can do from the ‘Setup Simulator?’ listing on the map options menu. The setup simulator page is available from any page in the main page se[...]

Going to a Destination (con’t.) Now that we’ve zoomed in a little closer to our route, we can pan ahead of our vessel with the cursor to review and create on-scr een waypoints and navaids. T ry moving the cursor to select the ‘TOUR3’ waypoint— just use the R keypad to move the cursor as close as possible to the waypoint. (T o move the cur[...]

15 GETTING S T AR TED Overview Navigation Page The Navigation Page provides graphic steering guidance to your destination. The bearing (BRG) and distance (DIS) to the destination, with your current course (COG) and speed over ground (SOG) , are displayed at the top of the page, along with a compass tape to indicate your cardinal heading. The estima[...]

16 Navigation Page (con’t.) To adjust the simulated boat speed: 1. Press the UP arrow of the R keypad to increase the speed in 5 knot/kph/mph incre- ments. Press the DOWN arrow to decrease the speed in the same increments. To steer the boat: 1. Press the LEFT or RIGHT arrows of the R keypad. Notice that as you get off course, the highway and wayp[...]

Active Route Page The active route page shows each waypoint of the active r oute in sequence, with the waypoint name, distance and estimated time enroute to each waypoint displayed. As you navigate the route, the active r oute list will be automatically updated, indicating the next destination waypoint. The active route page also pr o- vides quick [...]

Main Menu Page The main menu page’ s eleven submenus are divided into categories by function. Y ou can select a particular submenu by simply highlighting the desired option and pressing T . T o get a feel for how the main menu page works, let’ s clear out the track log we’ve created during our simulated tour . Clearing the track log will ensu[...]

Status Page The Status Page provides a visual r eference of various receiver functions, including current satellite coverage, receiver operating mode and curr ent receiver accuracy . The status information will give you an idea of what the receiver is doing at any given moment. The sky view and signal strength bars give you an indication of what sa[...]

AB Receiver Status, EPE and DOP Receiver status is displayed at the top of the page, with the current estimated position error (EPE) and dilution of precision (DOP) to the left of the sky view . DOP is an indication of satellite geometry quality measured on a scale of one to ten (lowest numbers the best, highest numbers the poorest). EPE uses DOP a[...]

Satellite Status Page Options The satellite Status Page features an options menu that pr ovides access to func- tions and features relating to the Status Page. To display the Status Page options menu: 1. From the Status Page, press O . There are four options: • Initialize Position?: Allows you to initialize the receiver graphically or by text. Se[...]

Position Page The position page shows your position, direction, and speed. There is a graphic compass tape at the top of the page that shows the direction you’re heading (you have to be moving), and four selectable data fields: course over ground (COG), speed over ground (SOG), distance traveled (TRP) and altitude (AL T). The bottom half of the p[...]

Position Page Options The position page features an options menu that pr ovides access to functions and features relating to the position page. To display the position page options menu: 1. Press O . There are four options: • Reset Trip Distance?: Resets the trip odometer (TRP) field to zero. • Change Data Fields?: Allows you to choose the data[...]

A. The right side of the screen represents the trans- ducer’s location on your boat. Items appearing on the right side of the screen were passed by more recently than those on the left. B. The four-level gray LCD screen makes it possible to easily separate sonar targets from their surroundings. A B Sounder Page The Sounder Page is where your GPSM[...]

Range Modes The sounder features three depth range modes: auto, manual, and window . Auto is the default setting and continually adjusts the screen display to show the maximum amount of detail possible, while always showing the bottom; manual allows you to adjust the sonar display’ s depth using the R keypad; window lets you establish a starting [...]

Zoom Feature The zoom feature allows you to view a smaller portion of the complete range in greater detail. The zoom feature operates in auto or manual mode. Auto zoom will follow the bottom contour while manual zoom will display the selected depth. For more on the zoom feature, see pages 26-27. To use the zoom feature: 1. While viewing the Sounder[...]

Zoom Window Depth Scale Once a zoom window is displayed, it’ s depth scale can be adjusted. A hollow indicator bar is displayed to the left of the depth scale on the original picture (top half of the screen). The depth scale of the zoom window corresponds to the range set by the indicator bar . T o adjust the depth scale of the zoom window , simp[...]

Map/Sounder Page Split Screen The sounder can display a split screen view of the sounder window and Map Page. The split screen feature is turned on fr om the Map Page . To view the split screen: 1. Press J until the Map Page appears. 2. Press O to display the Map Page options menu. 3. Highlight the ‘Setup Page Display?’ option and press T . 4. [...]

Sounder Page Options The Sounder Page options menu lets you customize the sounder’ s features to suit your needs. To display the Sounder Page options menu: 1. From the Sounder Page, press O . The following options are available: • Sensitivity Adjust?: Sensitivity controls the sounder’s ability to show echoes without introducing interference. [...]

Sounder Page Options (con’t.) • Whiteline Adjust: Whiteline indicates the relative hardness or softness of the bottom. The bottom itself is shown as a continuous black line, while the whiteline shows up as a light gray band just below. The whiteline becomes thicker or thinner depending on bottom hardness. A thin or absent whiteline indicates a [...]

Sounder Page Options (con’t.) Auto is the default setting and continually adjusts the screen display to show the maximum amount of detail possible, while always showing the bottom. Manual allows you to adjust the sonar display’ s depth using the R keypad. Window lets you establish a starting depth (top) and length (span) for the sonar display .[...]

Sounder Page Options (con’t.) • Change Data Fields?: Allows you to specify the data displayed in each data field on the Sounder Page. There are thirteen options: • BRG: Bearing to active wpt • DIS: Distance to active wpt • SOG: Speed over ground • COG: Course over ground • ETE: Estimated time enroute • ETA: Estimated time of arrival[...]

Sounder Setup Page The next Sounder Page menu option is ‘Sounder Setup?’ which accesses the sounder setup page. There are eight fields on the sounder setup page which allow you to customize the sounder’ s features: Fish ID, T arget Depth, W ater T emperature, W ater T ype, Noise Rejection, Keel Of fset, Frequency , and Speed Calibration. To a[...]

Sounder Setup Page (con’t.) To select Fish ID: 1. Highlight the ‘FISH ID’ option and press T . The ‘FISH ID’ submenu will appear. 2. Highlight the desired setting and press T . • Target Depth: Displays the digital depth of each fish symbol. •O n : Shows fish symbols with corresponding digital depth. • Off: Does not display depth. To[...]

Sounder Setup Page (con’t.) • Noise Rejection: Removes cross talk from other sounders or ignition noise from poor boat motor installations (non-shielded plugs, etc.). There are three options: • Off: The unit will not remove anything it thinks is cross talk noise. The noise will be displayed on the screen. • On: The unit will always remove a[...]

Sounder Setup Page (con’t.) There are four options: • 200 kHz: Best suited for shallow, inland waters where deep water performance is not critical and bottom detail and resolution is the highest priority. • 50 kHz: For maximum deepest readings. Note: Maximum readable depths in salt- water will be 25% - 50% less than freshwater depths, because[...]

37 GETTING S T AR T- ED Using the GOTO Key Sounder Setup Page (con’t.) To use Auto Calibration: 1. Ensure ‘Auto Calibrate?’ is displayed in the speed calibration field. If it is not, press O to display the calibration menu. 2. Highlight ‘Auto Calibrate’ and press T . 3. Press T again and an instruction message will appear. 4. Read the ins[...]

38 GETTING S T AR T- ED Using the GOTO Key Sounder Setup Page (con’t.) To use manual calibration: 1. Ensure manual calibration mode is selected in the speed calibration field. If not, press O , highlight ‘Manual Calibrate?’, and press O . 2. Press T . The slider bar will turn black and the calibration range bar will turn white. 3. Use the R k[...]

39 GETTING S T AR T- ED Using the GOTO Key Map Page The Map Page pr ovides a comprehensive display of electronic cartography , plotting and navigational data. The map display shows your boat on a digital chart, complete with geographic names, navaids, depth contours and other chart features. It also plots your track and displays any r outes and way[...]

40 GETTING S T AR T- ED Using the GOTO Key Map Modes There are two map operating modes: the position mode and the cursor mode. When the map is in the position mode, the position marker pans the cartography to keep itself within the display area. When the map is in the cursor mode, the cursor pans the cartography to keep the itself within the displa[...]

41 GETTING S T AR T- ED Using the GOTO Key Using the Cursor The cursor allows you to pan away from your pr esent position and scroll to other map areas (even outside of your current G-chart coverage). As you pan past the edge of the current map display , the screen will actively scr oll forward to pr o- vide continuous map coverage. To move the cur[...]

42 GETTING S T AR T- ED Using the GOTO Key Selecting Map Scales The map display has 16 available range scales from 1/8th to 4096 nautical miles (1/4 to 7500 kilometers). The map scale is controlled by the I and H keys, with the current scale displayed at the bottom of the data window . To select a map scale: 1. Press H to zoom out and I to zoom in.[...]

43 GETTING S T AR T- ED Using the GOTO Key Map Page Options The Map Page options menu provides access to many of the featur es and func- tions that will help you configure the Map Page to your own prefer ences. To display the Map Page options menu: 1. From the Map Page, press O . To select a menu option: 1. Highlight the desired option and press T [...]

44 GETTING S T AR T- ED Using the GOTO Key Map Page Options (con’t.) • Configure the Map?: Allows you to determine what map items are displayed on a particular map scale which will help prevent excessive clutter. The map configura- tion page shows a list of twelve map items with corresponding zoom scale selection boxes. To configure the map: 1.[...]

45 GETTING S T AR T- ED Using the GOTO Key Map Page Options (con’t.) From the map configuration page, you can also access another options menu by highlighting any of the items and pressing O . There are five options: •Enable or Disable a Row?: Allows you to turn an entire row on or off. To turn an entire row on or off: 1. Use the R keypad to se[...]

46 GETTING S T AR T- ED Using the GOTO Key Map Page Options (con’t.) •Set Map Colors?: The next option available from the map configuration page is the set map colors option, which allows you to define the fill color (grayscale) of the land and water used on the map display. Three options are available: no color (no fills for land or water), gr[...]

47 Map Page Options (con’t.) The last two display options make it possible to display both the Map Page and Sounder Page simultaneously in a split screen arrangement. The top half of the page will show a reduced-size Map Page while the Sounder Page is displayed in the lower half of the screen. Note: When the dual frequency 200 kHz/50 kHz is selec[...]

48 GETTING S T AR T- ED Using the GOTO Key Map Page Options (con’t.) •Change Data Fields?: Allows you to specify the type of data that is displayed in each data field on the map display. There are thirteen options: • BRG: Bearing to active wpt • DIS: Distance to active wpt • SOG: Speed over ground • COG: Course over ground • ETE: Esti[...]

49 GETTING S T AR T- ED Using the GOTO Key Navigation Page Whenever a GOTO, MOB, T racBack or route has been turned on, the sounder will provide digital and graphic steering guidance to the destination with the Navigation Page. The top half of the Navigation Page features four user -selectable data fields that display the bearing (BRG) and distance[...]

50 As you head toward your destination, the highway perspective will move to indicate your progr ess to the waypoint and which direction you should steer to stay on course. If you are navigating a r oute, the Navigation Page will show each route waypoint in sequence, with the active leg indicated by the white portion of the highway . Nearby waypoin[...]

51 GETTING S T AR T- ED Using the GOTO Key Navigation Page Options (con’t.) The following options are available: • Change Data Fields?: Allows you to define the type of data that is displayed in any of the six user-selectable data fields. Thirteen options are available: • BRG • DIS • DPT • SOG • COG • STW • ETE • ETA • TMP •[...]

52 GETTING S T AR T- ED Using the GOTO Key Main Menu Page The main menu page provides access to various waypoint, system, navigation and interface management and setup menus. To access the main menu page from any page in the sounder: 1. Press O twice. The 11 submenus are divided into categories by function. To select a submenu from the main menu pa[...]

53 GETTING S T AR T- ED Using the GOTO Key Creating and Using W aypoints The sounder stores up to 250 alphanumeric waypoints with user -defined sym- bols and comments available for each waypoint. W aypoints can be created using one of the following methods: • Mark Key: Although used primarily for marking your present position, the M key also prov[...]

54 GETTING S T AR T- ED Using the GOTO Key Mark Key (con’t.) The mark key can also be used on the Map Page to mark the cursor position or an on-screen navaid. T o mark a navaid, select it with the cursor . The sounder will use the navaid text shown on the cartography as the default comment. To mark the cursor or navaid position with the M key: 1.[...]

55 GETTING S T AR T- ED Using the GOTO Key Creating W aypoints Graphically W aypoints may also be quickly created fr om the map display , which allows you to ‘point and shoot’ at any map position and create a new waypoint. To create a new waypoint graphically: 1. Use the R keypad to move the cursor to the desired map position. If you want to cr[...]

56 GETTING S T AR T- ED Using the GOTO Key Reference W aypoints A new waypoint can also be created by entering an existing waypoint’ s range and bearing or the range and bearing from your pr esent position. The sounder will then calculate the position coordinates for you, using the r eference selected. To create a new waypoint using a reference w[...]

57 GETTING S T AR T- ED Using the GOTO Key Reviewing and Editing W aypoints Once you have created and stored a waypoint, it may be modified, r eviewed, renamed or deleted at any time using the waypoint definition page. The waypoint definition page is accessed by highlighting the desired waypoint fr om the map dis- play or selecting it from waypoint[...]

58 GETTING S T AR T- ED Using the GOTO Key W aypoint Definition Page Options The waypoint definition page also features an options menu that allows you to edit the selected waypoint on the map display , rename the selected waypoint or delete the waypoint from memory . To display the waypoint definition page options menu: 1. Press the O key. To revi[...]

59 GETTING S T AR T- ED Using the GOTO Key W aypoint Submenus The sounder’ s main menu page features four waypoint submenus that let you manage a large number of waypoints quickly and ef ficiently . The submenus also provide a continuously updated near est waypoints list and a proximity waypoint alarm function that can be used to define an alarm [...]

60 GETTING S T AR T- ED Using the GOTO Key Proximity W aypoints The proximity waypoints list lets you define an alarm cir cle around a stored waypoint position, and can be used to help you avoid reefs, r ocks or restricted waters. Up to nine waypoints may be listed, with a maximum alarm radius of 99.99 nautical or statute miles or kilometers. If a [...]

61 GETTING S T AR T- ED Using the GOTO Key Create W aypoint Submenu The third waypoint submenu accessible fr om the main menu page is the ‘Create W aypoint’ submenu, which allows you to create a new waypoint by manually entering coordinates. Instructions for using the ‘Cr eate W aypoint’ submenu are provided on page 55. W aypoint List The l[...]

62 GETTING S T AR T- ED Using the GOTO Key Navigation Methods The sounder provides four methods of navigation: GOTO, MOB, T racBack and Route . GOTO The sounder allows you to create a simple r oute consisting of your current posi- tion and selection of a single destination (waypoint) from the waypoint list. Any waypoint on the list can be selected [...]

63 GETTING S T AR T- ED Using the GOTO Key GOTO Options The GOTO options menu provides a list of additional GOTO options that let you start a T racBack route, select a destination waypoint fr om the nearest way- points list, select a route to navigate, or cancel the curr ent GOTO destination. To display the GOTO options menu from any page: 1. Press[...]

64 GETTING S T AR T- ED Using the GOTO Key MOB The man overboard feature (MOB) is used in emergency situations, such as man overboard, or to quickly mark a spot. To turn on the MOB feature: 1. Press the B key. 2. Press the T key to confirm and begin navigating to the MOB position. Once a MOB has been turned on, the MOB symbol will appear on the map[...]

65 T racBack Navigation (con’t.) Once a T racBack has been turned on, the sounder will take the track log cur- rently stored in memory and divide it into segments called ‘legs’. Up to 30 tempo- rary waypoints (e.g. T001) will be created to mark the most significant features of the track log in order to duplicate your exact path as closely as [...]

66 Routes The last way to navigate to a destination is to create a user -defined route. The sounder lets you create and store up to 20 r eversible routes (numbered 1-20), with up to 30 waypoints each. Routes can be created and modified right fr om the Map Page, allowing you to see each route graphically on-scr een as you create, review , modify or [...]

67 Routes (con’t.) Once a route has been cr eated graphically (and the Q key has been pressed to finish), the map display will automatically enter the route r eview mode. The arrow pointer will be replaced by the map cursor , located at the last route waypoint. The route edit mode allows you to r eview and modify the route displayed thr ough a po[...]

68 GETTING S T AR T- ED Using the GOTO Key Routes (con’t.) The route edit mode also allows you to insert a new r oute waypoint in any route leg using the map cursor . To insert a new waypoint between two existing route waypoints: 1. Use the cursor to select the leg you want to insert the new waypoint in (the route line will change to a dotted lin[...]

69 GETTING S T AR T- ED Using the GOTO Key Routes (con’t.) To review the selected waypoint: 1. Highlight the ‘Review?’ option and press T . To insert a new waypoint before the selected route waypoint: 1. Highlight the ‘Insert?’ option and press T . 2. Enter the name of the new waypoint using the R keypad, or press O to select the new wayp[...]

70 GETTING S T AR T- ED Using the GOTO Key Route List Page The route list page numerically lists all the routes currently stor ed in memor y , with the route number and comment displayed. Route 00 is always r eserved for the T racBack route, while r outes 1-20 serve as storage routes (r oute 20 is stored as the GPSMAP tour route, which may be delet[...]

71 GETTING S T AR T- ED Using the GOTO Key Route List Page Options (cont.) • Clear Route: Allows you to clear all waypoints from the selected route. To clear the selected route: 1. Highlight the ‘Clear Route?’ option and press T . 2. Press T to confirm the clear route warning. • Copy Route?: Allows you to copy the waypoints of a selected ro[...]

72 GETTING S T AR T- ED Using the GOTO Key Active Route Page Whenever you have activated a route, the active route page will appear in the main page sequence. The active route page shows each waypoint of the active route, with the waypoint name, desir ed track, cumulative distance and ETE or ET A for each waypoint from your present position. The cu[...]

73 GETTING S T AR T- ED Using the GOTO Key Active Route Page Options The following options are available fr om the active route page: • Invert Route?: Activates the active route in reverse order and begins navigation. • Activate Route?: Reactivates the active route and selects the route leg closest to your current position as the new active leg[...]

74 GETTING S T AR T- ED Using the GOTO Key T rack Log Submenu The track log submenu lets you specify whether to recor d a track plot (an elec- tronic r ecording of your path), and define how it is recor ded. It also provides an indicator of the amount of track memory used and selects functions to clear the track memory and start a T racBack route. [...]

75 GETTING S T AR T- ED Using the GOTO Key T rip and Fuel Planning The trip and fuel planning submenu lets you plan and r eview distance, fuel, and ETE/ET A information between any two waypoints, your present position and a stored waypoint, or any part of a stored r oute. Sunrise and sunset information is also provided. T wo planning modes are avai[...]

76 GETTING S T AR T- ED Using the GOTO Key T rip and Fuel Planning (con’t.) To use the route planning mode: 1. Highlight the ‘Trip & Fuel Planning’ option from the main menu and press T . 2. If the plan field is not set to ‘Route’, press O and select it from the options page. 3. Highlight the route number field and press T . 4. Use th[...]

77 GETTING S T AR T- ED Using the GOTO Key T rip and Fuel Planning (cont.) To use the sunrise/sunset planner: 1. Highlight ‘Trip & Fuel Planning’ option from the main menu and press T . 2. Highlight the first waypoint field and press T . Press the left arrow key to clear the field, and use the R keypad to enter the name of the desired waypo[...]

78 GETTING S T AR T- ED Using the GOTO Key Setup Submenus (con’t.) • Time Offset: Provides a data entry field to enter the time difference between UTC time and local time (see page 105 for a list of time offsets). When entering a time offset, be sure to select a positive or negative offset. Entering an offset will not auto- matically display lo[...]

79 GETTING S T AR T- ED Using the GOTO Key Navigation Setup The navigation setup submenu is used to select a variety of navigation informa- tion including: position format, units of measure, and heading refer ences. This submenu is also used to select map datums, set the CDI scale and adjust the built- in velocity filter . The following options are[...]

80 Navigation Setup (con’t.) • CDI Scale: Provides a list of six CDI scale settings for the Map Page CDI: +/-0.10, 0.50, 1.0 (default), 5.0, 10.0 and 25.0 miles or kilometers. The scale represents the distance from the center of the scale to either end of the scale. • CDI Steer To: Allows you select a steer-to-center or steer-to-D-Bar orienta[...]

81 GETTING S T AR T- ED Using the GOTO Key Timers and Alarms Setup The timer and alarms submenu is used to control various alarm/timer settings. • Timer: Sounds an alarm when an entered interval (up to 99:59:59) has expired, or provides a continuous running clock timer to 99:59:59. To use the countdown timer: 1. Select the Count Down menu option.[...]

82 Input/Output Submenu The Input/Output submenu lets you control interface settings for connecting external NMEA devices, a DGPS receiver or a personal computer . The ‘Input/Output Format’ field, at the top of the page, lets you specify one of seven interface formats: •Data Transfer: A proprietary interface that allows you to exchange data s[...]

83 GETTING S T AR T- ED Using the GOTO Key Using NMEA and DGPS Interface Settings If you are using an NMEA interface format, the NMEA format must be specified in the NMEA format field that will automatically appear when an NMEA option is selected. The appropriate baud rate will be set automatically . See page 96 for a list of NMEA supported sentenc[...]

84 Installing and Removing G-Chart Cartridges The unit uses G-chart offshor e or inland cartography to display digital charts on-screen. G-chart cartridges are installed in the car d slot located at the bottom right of the unit. G-chart cartridges may be installed or removed at any time, whether the unit is on or off. To install a G-chart cartridge[...]

85 Using G-Chart Cartography Once a G-chart cartridge has been inserted, the map coverage outlines for the cartridge will automatically appear on-screen. Keep in mind that the display will not automatically scroll to the map ar ea or zoom to a level where you can see the coverage outlines. If you do not immediately see the outlines, scroll the curs[...]

LORAN C Basics LORAN C is a radio navigation aid operated and maintained in the United States by the Untied States Coast Guard. The name LORAN is an acr onym for "Long Range Navigation". The LORAN system covers the entire United States and the U.S. Coastal Confluence Zone. From the perspective of a mariner , the system is used for ocean a[...]

LORAN TD Feature The LORAN TD feature eases the transition fr om using LORAN to using GPS. The GPSMAP 235 Sounder automatically converts GPS coordinates to LORAN TDs for those who have a collection of LORAN fixes for favorite fishing spots and other- waypoints recor ded as TDs. Y ou can display your position as a TD or enter way- points as TDs. The[...]

It is impor tant to set the correct GRI-chain and secondary stations for the way- point that you want to create. The GRI-chain and Secondary station fields cannot be edited on the Create W aypoint page. The first setting on the LORAN Setup page is the LORAN Chain Number (GRI chain). Accessing this field activates a dropdown menu containing the 28 a[...]

Creating W aypoints in the LORAN TD Format W aypoints can be created graphically , using the Mark Key , and by T ext Entry (see page 53). W aypoints can also be created using LORAN TDs. T o create a waypoint using the LORAN TD Position Format: 1. Verify that the correct GRI Chain and secondary stations are selected on the 'LORAN SETUP' pa[...]

90 Sounder Installation The GPSMAP 235 Sounder must be properly installed according to the follow- ing instructions to get the best possible performance. The GPSMAP 235 Sounder is available both with and without a transducer and cable (the cable must be used for FCC compliance). The part numbers are 010-00119-00 (unit without the transducer) and 01[...]

91 Mounting the Sounder The unit’ s waterpr oof case is suitable for mounting in exposed locations or at the nav station. The unit comes with a gimbal bracket that can be used for surface or overhead mounting. When choosing a location for the unit, make sure you consider the following conditions: • There should be at least a 3” (7.7 cm) clear[...]

92 To flush mount the sounder: 1. Remove the four M5 screws from the back of the unit and remove the mounting bracket. 2. Using the mounting template provided in the box, determine where you wnat to mount the unit and tape the template in place. 3. Using a hammer and center punch, mark the centers of the relief hole and mounting screw holes. 4. Usi[...]

93 SEC TION A APPENDIX Installation Figur e 1-F or thick mounting sur- faces, insert the M5 scr ews dir ectly thr ough the four drilled holes. Figur e 2-For thin panels, place the mounting bracket on the back side of the panel for additional support. 19000138.10A.QXD 11/11/99 8:47 AM Page 93[...]

Garmin offers a variety of transducers for use with your Sounder. Detailed installation instructions for the transducer you have selected are included with the transducer. Proper placement and installation of the transducer are essential in the operation of the sounder portion of the unit. Carefully follow the instructions provided with your transd[...]

95 Connecting the Power/Data Cable The power/data cable connects the GPSMAP 235 to a 10-40 volt DC system and provides interface capabilities for connecting external devices, including an external alarm. The color code in the diagram below indicates the appropriate harness connections. SEC TION B APPENDIX Wiring and Specifications WARNING! The temp[...]

96 SEC TION B APPENDIX Wiring and Specifications DGPS corrections are accepted in RTCM-104 v. 2.0 format through the NMEA In (BROWN) har- ness lead. The GARMIN GBR 21 is the recom- mended beacon receiver for use with the GPSMAP 235 system. Other receivers with the correct RTCM format may be used, but may not correctly display status or allow tuning[...]

97 PHYSICAL Case: Gasketed Construction Size: 7.5”H x 7.7”W 2.6”D (19.2 x 19.74 x 6.7cm) Weight: Less than 2 lb. Temperature Range: -4º to +158ºF (-20º to 70ºC) PERFORMANCE (GPSMAP 235 Sounder) Receiver: 12 parallel channel Acquisition Time: Approx. 15 seconds (warm) Approx. 45 seconds (cold) Approx. 5 minutes (AutoLocate TM ) Approx. 5 m[...]

98 Alarm Clock— The alarm clock has sounded. Anchor Drag Alarm— You have drifted out of the specified distance range. Approaching— You are less than one minute away from reaching a destination waypoint at your present speed over ground. Arrival At— You have arrived at the destination waypoint. Can’t Change An Active Waypoint— You have a[...]

99 Proximity Alarm— You have entered the alarm radius for the proximity waypoint indicated. Proximity List Full— You have used all nine proximity waypoints. Proximity Overlaps Another Prox Wypt— The alarm radius specified overlaps the area specified for another proximity waypoint. (See section 10 for more information on proximity overlaps.) R[...]

100 Adindan Adindan- Ethiopia, Mali, Senegal, Sudan Afgooye Afgooye- Somalia AIN EL ABD ‘70 AIN EL ANBD 1970- Bahrain Island, Saudi Arabia Anna 1 Ast ‘65 Anna 1 Astro ‘65- Cocos I. ARC 1950 ARC 1950- Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe ARC 1960 Kenya, Tanzania Ascnsn Isld ‘58 Ascension Island ‘58- Ascension Islan[...]

101 Corrego Alegr Corrego Alegre- Brazil Djakarta Djakarta (Batavia)- Sumatra Island (Indonesia) Dos 1968 Dos 1968- Gizo Island (New Georgia Islands) Easter Isld 67 Easter Island 1967 European 1950 European 1950- Austria, Belgium, Denmark, Finland, France, Germany, Gibraltar, Greece, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, [...]

102 NAD27 Greenland North American 1927- Greenland (Hayes Peninsula) NAD27 Mexico N. American 1927- Mexico NAD27 San Salvadr North American 1927- San Salvador Island NAD83 North American 1983- Alaska, Canada, Central America, CONUS, Mexico Nahrwn Masirah llnd Nahrwn- Masirah Island (Oman) Nahrwn Saudi Arbia Nahrwn- Saudi Arabia Nahrwn United Arab N[...]

103 Almanac Data : The satellite constellation information (including location and health of satellites) that is transmitted to your receiver from every GPS satellite. Almanac data must be acquired before GPS navigation can begin. Bearing (BRG) : The compass direction from your position to a destination. Course Over Ground (COG) : Direction of move[...]

104 Thermocline — A layer of water separating warmer water above from cooler water below. Turn (TRN) — The difference and direction in degrees between the bearing to your destination and your course over ground. The TRN value is used to indicate what direction, and how many degrees, to turn to get back on course. Universal Time Coordinated (UTC[...]

105 The chart below gives an approximate UTC time of fset for the various longitu- dinal zones. Check with local charts for more detailed information. If you are in daylight savings time, add one hour to the offset. Longitudinal Zone Offset W180.0º to W172.5º -12 W172.5º to W157.5º -11 W157.5º to W142.5º -10 W142.5º to W127.5º -9 W127.5º t[...]

2D Navigation . . . . . . . . . . . . . . . . . . . . . . . . .20 3D Navigation . . . . . . . . . . . . . . . . . . . . . . . . .20 A ccessories . . . . . . . . . . . . . . . . . . . . . . . . . . .vi Acquiring Satellites . . . . . . . . . . . . . . . . . . . . .20 Active Route Page . . . . . . . . . . . . . . . . . . .17, 72 Addresses/Phone Number[...]

Map Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .40 Map Orientation . . . . . . . . . . . . . . . . . . . . . . .44 Map Page . . . . . . . . . . . . . . . . . . . . . . . . .10, 39 Center On First Wpt . . . . . . . . . . . . . . . . .69 Center On Vessel . . . . . . . . . . . . . . . . . . . .69 Configuring . . . . . . . . . . . . . . [...]

SEC TION G APPENDIX Index 108 Simulated Boat Speed . . . . . . . . . . . . . . . . . . .12 Simulated Boat Steering . . . . . . . . . . . . . . . . .16 Simulating Navigation . . . . . . . . . . . . . . . . . . .20 Simulator Mode . . . . . . . . . . . . . . . . . . . . . . . .4 Sounder, Turning Off . . . . . . . . . . . . . . . . . . .18 Sounder Alar[...]

© 1999 GARMIN Corporation www .garmin.com GARMIN International, Inc.,1200 E. 151st Street, Olathe, KS 66062 USA GARMIN (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9AQ UK GARMIN (Asia) Corp., 3F ,. No. 1, Lane 45, Pao Hsing Road, Hsin T ien, T aipei, T aiwan R.O.C. Part Number 190-00138-10 Rev . B 19000138.10A.Q[...]