Still doesn't explain why all star ships in every space movie are always oriented the same direction
I have always wondered this myself. Maybe they are all oriented level to the galactic plane. But back on topic, you could use a ship ID token placed on the bomb token to mark its velocity. Say you deployed the bomb on a forward 3 move then place a 3 ship ID token on the bomb token to keep track of the bomb’s velocity. Or you could use a bomb token made like a maneuver dial with all straight moves. Just turn the dial to match your ships last move at the time of deployment. That is if you wanted to have a moving bomb in your game. I know some of you may think it’s silly but I think it would be awesome against huge ships.
A fixed speed is fine - less book-keeping from turn to turn, especially if there's a whole flock of bombers releasing bombs in a pattern like you may get in an epic game.
I would suggest it the other way around - they move at a given speed (2-3 straight) straight ahead each turn at PS 0 - and you need to reveal a manouvre at that speed to drop it (i.e. you can't drop it at speed 5)
I like the idea in theory; ballistic 'dumb weapons' that the player aims by eye and manouvre rather than dice would make an interesting counterpoint.