[CapnScurvy]

I agree Panthercules that the usefulness of a calculator like this really comes into effect if the Gameplay Settings have the Map Update set ON. In this way measuring the target distance traveled within a time period will give you its speed.

The abillity to track a target on the Navigation Map becomes much more difficult when plotting its course from visual guesstimation. I say its an estimate because to visually determine range to target and angle on bow we are doing so in a 2D environment. The fact is we are looking at a flat 2 dimensional screen as we play a 3 dimensional game. Much like covering one eye, depth perception is hampered if not totally lost. Using observation to determine range or AoB can be a tricky venture. A tool like this with the aid of the map updater can make for an enjoyable game experience for those who wish to use it. For those who wish a more realistic adaptation of submarining, join the Navy. We are still just playing a game, on a 2 dimensional device, with make-believe shipmates.

As far as the Knot per Hour advice, if UBISOFT can put its name on a bug riddled game like this, the least I can do is not be bothered by the semantics of a phrase.