Garmin GPS III Owner's Manual

Also see for GPS III: Declaration of conformity Quick guide Owner's manual Owner's manual

Garmin GPS III Owner's Manual Manual pdf 13 page image

Once the GPS III Pilot has calculated a position fix, you’ll usually have anywherefrom five to twelve satellites in view. The receiver will then continuously select the bestsatellites in view to update your position. If some of the satellites in view get blockedor “shaded,” the receiver can simply use an alternate satellite to maintain the positionfix. Although a GPS receiver needs four satellites to provide a three-dimensional(3D) fix, it can maintain a two-dimensional (2D) fix with only three satellites. Athree-dimensional fix means the unit knows its latitude, longitude, and altitude, whilea two-dimensional fix means the unit knows only its latitude and longitude.Initializing Your GPS III PilotTo initialize the GPS III Pilot, take the receiver outside and find an open area wherethe antenna has a clear view of the sky. You may either hold the receiver at a comfort-able height with the antenna pointing up (see page 4), or mount the receiver on thedash of a vehicle, as described in Appendix A. (Likewise, when you use your GPS IIIPilot in a vehicle, make sure the antenna is pointing up.)To turn the GPS III Pilot on, press and hold the red power key.The Welcome Page will be displayed while the unit conducts a self test. Oncetesting is complete, the Welcome Page is replaced by the Database Page (which shows theeffective date for the Jeppesen database), followed by a warning page, then by the SatelliteStatus Page. A message will inform you to “select initialization method.” (If the initializa-tion prompt has not automatically appeared, press MENU and select ‘Initialize Position’.)To initialize your unit:1. Press ENTER to acknowledge the message. A window will appear prompting you toselect an initialization method.2. Use the rocker keypad to highlight ‘Use Map’, and press ENTER.3. Use the rocker keypad to point the map cursor to your approximate location (within atleast 250 miles). You may also wish to use the IN and OUT zoom keys to make it easier toidentify your approximate position.4. Press ENTER to select the position and begin searching for satellites.Check the Satellite StatusPage for ‘2D Navigation’ or‘3D Navigation’ to verify aposition fix.The Welcome Page isdisplayed when the GPS IIIPilot is first turned on. Duringthis time the receiver is con-ducting a self-test.5GETTING STARTEDInitialization