Lost: How did they move “Jughead”?

In “Follow the Leader”, we saw the following dialogue[1]:

JACK: You wanna tell me how we're gonna get a bomb out of here?

RICHARD: The same way we brought it in.

JACK: I assume you don't mean through the pool.

RICHARD: It's a 12-foot long, 40,000-pound hydrogen bomb. No, not through the pool.

It’s a good question. How _did_ they transport the bomb?

Links

1. http://lostpedia.wikia.com/wiki/Follow_the_Leader_transcript