[Spaceships] Actually GMing a world with Pseudovelocity drives?

[Anaraxes]

Hoverbombs would be the ultimate weapon

Spaceships doesn't go into a lot of detail, but I recall one sentence that says velocity acquired while under PV drive simply vanishes when you turn the PV off. So no hoverbombs with this definition of PV. Of course, this aggravates the matching course with Mars problem, as you can't gradually accumulate the proper vector while on your way. For interstellar travel it doesn't bear thinking about.

If you bounce radar off a ship under PV drive, what does the Doppler shift look like? I'd assume that you get Doppler readings for the true velocity. The radar equipment would have to determine your PV by taking the difference in position over different samples in time. The display probably returns both values as a matter of course.

Time dilation? It seems like half the point of PV would be to dodge such questions, so base it on true velocity. But Mach's Principle bugs me in that regard.