Question about speed

[Kayohgee]

How is the speed of the ships measured in game? Is it measured by the grid, and in seconds? For example, if a ship has a speed of 1.6, does that mean is simply travels over 1.6 squares a second?

I'm mostly wondering because I want to know if I can calculate when two ships of different speeds will reach the same target. Say, a frigate and a cruiser.

[cliffski]

The ships speed is basically it's movement in pixels per frame, at 60 frames per second, given zero zooming in.
That's from me looking at the code, because nobody ahs asked that before :D
Not all ships are going at 100% of their speed all the time. Tehy acclerate and decelerate, as well as take damage to engiens which can reduce speed.