[Suicide Junkie]

Loss of B/CQ/LS does not, in fact reduce you to 1 MP.

1MP is the minimum speed that their loss will reduce you to.

No Bridge = Half Movement
No Crew Quarters = Half Movement
No LifeSupport = One Quarter Movement

These multiply together, so a ship without bridge or crew quarters gets 1/4 movement, and a ship lacking bridge and lifesupport gets 1/8th movement.
This is rounded down.

So, a ship with no lifesupport, but 13 MP normally, will still have 3 MP to limp home on.