If that's the case, the mole can just plant bombs in key locations and snuff out key systems. Or sabotage the ventilation system to pass carbon monoxide throughout the ship.
Well in the main hall we can see some marines with guns guarding all the doors. I'm sure that if you don't have proper clearance that it'd be hard to get in. But seeing as it was a mole, I guess he would be able to get past security. However, some random dip**** walking around into all the life support rooms on the ship is bound to rouse suspicions.
And seeing how this is all in space, I'm sure people would have gas masks of some kind in case of hull breaches and all that stuff. So while you might get a few people with CO, I think they'd have enough sense to know what's going on and get their gas masks/space suits/wotevars on.
That was one of my earlier ideas, yes. Most people had that idea. But storming a destroyer needs LOTS of marines.
Well seeing as the majority of the 10,000 people on board would probably not be fully combat equipped, I don't think it'd be too hard to send in a few thousand marines to storm a ship. An Argo was described as carrying several hundred people on it during the mission Exodus ("Thousands of lives are at stake" or something along those lines), so I'd say ~8 Argo transports and a few well-placed Cyclops torpedoes would be able to take over the destroyer.
In the Shipyard demo mission, 5 Argos were used to take over a destroyer's skeleton crew, though they were stupidly deployed since they waited around. If they had been sent in one at a time they probably would have been harder to intercept...
Imo, i think creating an emp field will cut off remote self destruct controls.
Or "localizing the controls" (cutting off commands from the bridge) would probably be easier.
Yeah, but once its been disarmed and disabled, you can just cart them in by the bucketload.
Well as I said you probably don't need too much time to send in the marines (~10 minutes). An Orion has 2 docks in-game, I'm willing to bet it has more dispersed around the other sections of the ship.