[. . . ] B Printed in Taiwan. i GARMIN TM , GPSMAP TM , G-chart TM , AutoLocateTM, TracBackTM and PhaseTrac12TM are trademarks of GARMIN International and may only be used with permission. All rights are reserved. Foreword INTRODUCTION Cautions CAUTION 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 721 is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore, become unsafe. [. . . ] Once a position has been selected graphically, the create new waypoint page will appear. Here you can change the waypoint name, symbol or comment before saving the waypoint. To create a waypoint by text entry, start by entering the new waypoint's name. Waypoints may also be created by manually entering a position's coordinates or referencing a stored waypoint through the `Create Waypoint' submenu option on the main menu page. To create a new waypoint by manually entering its coordinates: 1. The waypoint definition page will appear, with the next available waypoint number and the receiver's last known position as the default name and position. Use the R keypad to enter the new waypoint name, icon, position and comment. When you have finished entering all your waypoint data, use the R keypad to highlight the `Done' prompt and press T. Reference Waypoints A new waypoint may also be created without knowing position coordinates by entering its range and bearing from an existing waypoint or your present position. The GPSMAP 721 will then calculate the position coordinates for you, using the reference selected. WAYPOINTS Creating a Waypoint by Reference SECTION 6 To create a new waypoint using a reference waypoint: 1. Select the `Create Waypoint' option from the main menu page and press T. Enter the name of the reference waypoint using the R keypad, or press O to select the waypoint from the nearest list, waypoint list, or map display. Press T to begin entry of the bearing from your reference waypoint to the new waypoint position. Press T to begin entry of the distance from your reference waypoint to the new waypoint position. Highlight the `Nearest Waypoints' option and press T. A B A. The nearest waypoint list continuously updates to show the nine nearest waypoints to your present position. 2. To return to the waypoint list, highlight the `Done?' prompt and press T. If you want to review each waypoint, you can scroll through any waypoint list by pressing the T key repeatedly. To select a nearest waypoint as a GOTO destination: 1. Press G, followed by T. 40 Proximity Waypoints The proximity waypoints list lets you define an alarm circle around a stored waypoint position, and can be used to help you avoid reefs, rocks 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 proximity alarm circle overlaps with an existing alarm circle, a `Proximity Overlap' message will appear each time the unit is turned on. If you enter an alarm circle overlap, you will only be alerted to the closest proximity waypoint. To enter a proximity waypoint: 1. Use the R key to highlight the first blank waypoint field and press T. Enter the name of the proximity waypoint using the R keypad, or press O to select the waypoint from the nearest waypoint list, waypoint list, or map display. Use the R keypad to enter a distance value (to 99. 99 units) and press T. WAYPOINTS Proximity Waypoints SECTION 6 A B A. [. . . ] Massawa- Eritrea (Ethiopia) Merchich- Morocco Midway Astro `61- Midway Minna- Nigeria North American 1927Alaska North American 1927Bahamas (excluding San Salvador Island) North American 1927Canada and Newfoundland North Am. 1927- Canal Zone North American 1927Caribbean (Barbados, Caicos Islands, Cuba, Dom. Cayman, Jamaica, Leeward and Turks Islands) North American 1927Central America (Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua) North Am. 1927- Mean Value (CONUS) North American 1927Cuba APPENDIX Map Datums SECTION D 75 SECTION NAD27 Greenland D APPENDIX Map Datums NAD27 Mexico NAD27 San Salvadr NAD83 Nahrwn Masirah llnd Nahrwn Saudi Arbia Nahrwn United Arab Naparima BWI Obsrvtorio `66 Old Egyptian Old Hawaiian Oman Ord Srvy Grt Britn Pico De Las Nieves Potsdam Pitcairn Astro `67 Prov So Amricn `56 Prov So Chilean `63 Puerto Rico Qatar National Qornoq North American 1927Greenland (Hayes Peninsula) N. [. . . ]