From BotE Wiki
The speed of spaceships tells us how many Sectors the ship can travel every turn:
- 0 sectors/turn (stationary, mostly outposts and Alien battlestation
- 1 sector/turn (slow)
- 2 sectors/turn (medium)
- 3 sectors/turn (fast)
- 4 sectors/turn (very fast)
However, there can be several anomalies that influence speed (for example Magnetar - speed drops to zero).