RCAS We-Couldn't-Think-Of-An-Awesome-Name
"Ok, please rescue the remaining crew, we'll make our own way out. The briefcase contains a nuclear device, previously held by separatists."
The captain opened a cabinet.
"Take a set of diving gear, and on my command, hit the emergency release switch."
They both pulled on their diving gear.
"Now."
The hatch opened, and water burst into the cabin.
"Go! Go! Go!"
They left the cabin, and began to swim towards the boats.

Colofomosian destroyer Permanent Vengeance
"Detonate the device. And set a course for home."

HMCS Foreshadowing
Observed by no-one, a medium sized box hidden inside the generator bleeped once, then exploded, punching a hole in the side of the submarine.