2Getting StartedSelecting OptionsThe GPSMAP 178C Sounder’s advanced keypad system is designed to allow for fast, convenientselection of navigation options and data entry. The Getting Started Tour introduces you to the keypadand provides a ‘hands-on’ lesson in using the GPSMAP 178C Sounder. We strongly encourage youto follow the Getting Started tour before using your unit for actual navigation. The GPSMAP 178CSounder Quick Reference Guide contains helpful tips on using the unit and performing various naviga-tion tasks.Selecting Options and Entering DataYou can select and activate options and enter data to customize the GPSMAP 178C Sounder to fityour requirements. You can use the ENTER/MARK key and ARROW KEYPAD to select options, enternames and numbers in data fields, and activate your selections.To select and activate an optional feature:1. With any page displayed, press the MENU key to pop-up the options menu. The options menu dis-plays a list of optional features which are specific for that particular page. To select any feature onthe list of options requires movement of the cursor, which is identified as “highlighting”, selectingor choosing an item in a list or a field (box) on a page.2. Use the ARROW KEYPAD to move the cursor (highlight) up and down a list or up, down, andsideways on menus.3. Once you have moved to the desired selection, press the ENTER key to either activate the featureor the MENU key to pop-up a sub-menu or list of yet more feature options. Repeat this process toselect an option from the list or press the QUIT key to return to the previous setting.The QUIT key moves backwards through these steps or back to the main page you started on.To select and activate a function button:1. When moving about a page with function buttons, like the ‘New Map Waypoint’ page, you observefunctions such as ‘Delete’, ‘Show Map’ and ’OK’. To activate the function, highlight the desiredbutton and press the ENTER key.Options Menu withhighlighted option.Use the ARROWKEYPAD to highlightthe next option. PressENTER/MARK toactivate.Pop-up list of options for a highlighted field.