Marine Settings
Select
to open the apps list, and select Settings > Marine.
Appearance: Sets the appearance of marine navigation aids on the map.
Marine Alarm Setup: Sets alarms for when you exceed a specified drift distance while anchored, when you are off course by a specified distance, and when you enter water of a specific depth (Setting Up Marine Alarms).
Marine Speed Filter: Averages the speed of your vessel over a short period of time for smoother speed values.