90MessagesThe GPS II+ uses a flashing on-screen message indicator to alert you to important information. Wheneverthe message indicator appears, press PAGE to view the message page. There are two types of messages: tem-porary alerts and condition alerts. Temporary alerts can be cleared from the message page, while conditionalerts remain until the condition has been resolved. For your safety, pay careful attention to all messages.Appendix DActive WPT Can’t be Deleted—You have attempted tochange the ‘active to’ or ‘active from’ waypoint. Clear theactive route or GOTO before making your changes.Accuracy has been Degraded—The unit’s accuracy has beendegraded beyond 500 meters due to poor satellite geometry ordata quality. Check other navigational sources to verify theposition indicated.Already Exists—The name you are entering already exists inthe GPS II+’s memory.Approaching—You are one minute away from reaching a des-tination waypoint.Arrival at—You have reached your destination waypoint.Battery Power is Low—The batteries are low and should bereplaced.Leg not Smoothed—The upcoming route leg is too short forsmooth waypoint transitions.Memory Battery is Low—The battery that sustains usermemory is low and should be replaced by an authorized ser-vice center as soon as possible. Failure to do so may result inloss of stored data, including all user waypoints and routes.Need 2D Altitude—The unit needs altitude input in order tostart and/or continue 2D navigation.Need to Select Init Method—You must select an initializa-tion method so the unit can locate satellites and obtain a fix.No DGPS Position—Not enough data is available to com-pute a DGPS position.No Position—The unit has not obtained a position fix andcannot mark a position.