Lowrance Elite-4 DSI Operation Manual - Page 35

Settings Navigation Controls Arrival Radius and Off Course distance settings and is used to turn on/off WAAS/MSAS/ EGNOS. Arrival Radius Sets the arrival radius threshold for the Arrival alarm. The arrival alarm will sound when your vessel comes within a selected distance (arrival radius) of the destination waypoint. Navigation Settings menu Off Course Distance Sets Off Course Distance threshold for the Off Course alarm. When the selected off course distance is exceeded, the Off Course alarm will sound when the alarm is enabled. WAAS/MSAS/EGNOS Turns on/off the Wide Area Augmentation System (WAAS), Multi-Functional Satellite Augmentation System (MSAS) and European Geostationary Navigation Overlay Service (EGNOS). All three systems help increase GPS accuracy for different parts of the world. 33