That, too. Or at least they have to find Spock and Saavik before the Klingons down on the surface have time to react, and there might be tricks to slow down their response.
But it's really a tango that takes three, no matter what. The heroes must
a) lure the Klingon boarding party away from their ship, to make a later takeover possible
b) make sure the Klingon ship doesn't fire at the helpless
Enterprise until the heroes are all safely offboard
c) rescue the surface team
d) eventually escape from the lethal surface
Now, there aren't too many ways to do that. Most attempts at commandeering the Klingon ship would end in failure, because Klingons are extremely trigger-happy, the
Enterprise is a goner, and the only weapon at the heroes' disposal is the transporter beam. Really, sidestepping to the planet is the safest way: it allows the
Enterprise herself to be turned into a weapon that can defeat a horde of Klingons, it presents no target for Kruge at the helm of the BoP, and it takes our heroes to their next target, the surface team.
Trying to lure the Klingons into dropping their shields and then beaming them all to space would probably fail: even one surviving Klingon could then kill all the heroes in their helpless starship. Trying to beam aboard the BoP would pit our outnumbered heroes against a foe with a home field advantage. And Kruge would have none of Kirk's suggestions of sending over a negotiator, or whatever underhanded stalling trick he might come up with.
Presumably the antimatter tanks are designed to withstand heavy impacts and "conventional" explosions. They are probably the strongest part of the ship.
Yeah, the good old chestnut: "Why don't they make entire airplanes as strong as those black boxes?"...
There's a fun case to the point, although unintended by TPTB: in DS9 "Battle Lines", a runabout is compromised and has to eject her antimatter bottle before crashing. We then see the crashed craft represented by a full-scale (if partial) prop, and there's debris next to it. This includes a bit that cannot possibly have come from the exterior of the runabout herself - it's the nacelle of the TNG shuttle prop, and no part of the runabout is shaped like that. So it must have come from the
interior of the runabout... Apparently, the heroes crashed right next to their own jettisoned antimatter pod!
Timo Saloniemi