Hoo-boy, let me butt in here.
The question you guys are (oddly, to me) confounded by can just as
rationally be applied to ALL SORTS of things in this and other space
genre films - the entire space-travel/ocean-travel parallel thingy. Why
do they have ranks? Why is it a 'ship'? Why is the head guy 'Captain'?
Why is the floor a 'deck'? And on, and on, and on. Burial at sea (or
space) doesn't have anything to do with whether or not you've got
_family_ (c'mon, you think everybody buried at sea was done that way
because nobody would collect the body?) It's stench, superstition and
tradition. Heck, if you're in the (US) Navy, they'll bring your body
back, cremate it, and tote your ass back out to sea and dump you over
the side...if that's what you want. And it'd be easy enough to surmise
the EXACT same thing happening in the 'Alien' universe - a service not
unlike the one now that does (did) this with the space shuttle. Bring
'em back and shoot 'em back into space. There's NO reason not to think
that the Weyland-Yutani employee application form (for space-faring
positions) doesn't have a check-box: "Burial at space?" I'll betcha
Dallas could even perform marriages. No reason not to think he
_couldn't_ , and no reason to be surprised if he did. He's the
'Captain' of a 'ship'. (Why isn't he the Maitre'd of a Rockete'? Huh?
Hey, if the French had won the space race....just kidding. :)
So, if you're willing to accept all the _other_ nautical carry-over
into space, I don't see how this can raise an eyebrow in the least. And
if NOT, in the matter of all that other maritime gobbledygook on a
spaceship, you're a lot like Lucy - you got some 'splainin' to do! :)
>> Stay informed about: Kane's funeral