Copying my other comment: Apparently they do secure to the deck after landing. Discussed here: http://space.stackexchange.com/q/6403/574 http://space.stackexc

Copying my other comment: Apparently they do secure to the deck after landing. Discussed here: http://space.stackexchange.com/q/6403/574 http://space.stackexchange.com/q/6403/574