Under water objects (arrowheads), as the boat passes over

[ral61 1]

As I was driving my speedboat with the mini map screen on, I see "green" arrow heads on the map.

I notice these object are under water when the boat passes over them, and there's nothing on top of the water seen, when the boat is driving.

Any hint as to what these objects are, on the mini map?  I almost thought I was driving at something "invisible" on the water sim.

[Rolig Loon 25,255]

2 minutes ago, ral61 said:

As I was driving my speedboat with the mini map screen on, I see "green" arrow heads on the map.

I notice these object are under water when the boat passes over them, and there's nothing on top of the water seen, when the boat is driving.

Any hint as to what these objects are, on the mini map?  I almost thought I was driving at something "invisible" on the water sim.

People. An avatar at roughly your own elevation is a green dot.  One who is above you or below you is an arrow that points either up or down. 

[Lindal Kidd 16,022]