[quote=LeeRoy]
Nah, can't concern ourselves with a self destruct device. Because if you fired it in combat, you'd blow yourself into fine red paste.Because y'could nae escape the blast radius, Laddie.
[/quote]

I'd drop it from space, of course.

The self destruct is what happens if you aren't careful in how you kill the ship. There are 1600 kilograms of antiprotonium aboard, which is why he isn't usually allowed to operate in populated areas. The annihilation of all that antiprotonium would have tremendous implications, namely a 74080 megaton explosion. Garrett is flying the biggest bomb in history. Destroy the ship incorrectly, and that bomb goes off.

To avoid a deliberate self destruct, you only have to kill Garrett. There is a two-man rule.