* See the “GSD 20 Sounder Module with GarminChartplotters” (190-00241-03) for operationalinstructions.Main Menu PageThe GPSMAP 172/172C’s Main Menu Page provides access to various waypoint, system, navigationand interface management, and setup menus in an easy to use “tab” format. The Main Menu page isavailable from any page in the GPSMAP 172/172C’s system, and is accessed through the MENU key.See pages 2-3 for additional instructions changing settings and entering data.To access the Main Menu Page:1. Press MENU twice. The 16 Menu tabs are divided into categories by function.To select a Menu tab from the Main Menu page:1. Move the ARROW KEYPAD UP or DOWN to highlight the tab you want to view. The informationfor the highlighted tab automatically appears to the right. If you want to highlight any of the sub-menu tab items, press to the RIGHT on the ARROW KEYPAD, then move UP or DOWN to selectindividual items.2. Press either MENU for additional submenu options or press ENTER/MARK to make changes to thehighlighted item. Press LEFT on the ARROW KEYPAD to get back to the Menu tab list. Press QUITto return to the Main Menu page.The Main Menu tabs are:• GPS – shows satellite status, accuracy, initialize position.• Tide – shows 24 hour tide chart with levels and times.• Trip – provides trip speeds, odometers, averages, and trip timers.• Celes – shows sun/moon time cycles and positions.• Points – allows you to create, edit or delete waypoints. See pages 30.• Route – allows you to create, edit, activate or delete routes. See pages 43.• Track – lets you record a track, define how it is recorded and displayed.• DSC— allows you to control the Digital Selective Calling (DSC) interface.• Card – interface control for saving waypoints, routes and tracks to a data card.• Map – sets up Map Page features, zooms, and text size. See pages 21.• Hiway – sets up Highway Page features. See pages 29. (continued)MainMenuTabsSubmenu TabsMain Menu PageReferenceMain Menu Tabs