Apparently they do secure to the deck after landing.<p>Discussed here: <a href="http:&#x2F;&#x2F;space.stackexchange.com&#x2F;q&#x2F;6403&#x2F;574" rel="nofollow">http:&#x2F;&#x2F;space.stackexchange.com&#x2F;q&#x2F;6403&#x2F;574</a>