Navionics Boating: Speed and Track Behavior on iOS

There is a minimum speed within the Navionics® Boating app with iOS. At speeds under 1.5 knots (approx 1.7 mph) the speed window will display at 0 and the heading vector from the boat position will disappear. This will not affect the boat's position movement or the drawing of the track, as these are updated based on the GPS position the app is receiving.

In a track, if the speed received is less than 0.3 knots, the speed is set to 0. Speed will also show 0 if invalid data is received.