Plan B is the navy turning up so I've just put together a squad of marines who arrive wearing red shirts...
Which reminds me while I'm here... I could guess that you'd have a Lt commanding, a sergeant and a corporal and a marine. Takes care of 4 of the 'six' (convention sized gaming group for an alternative way of running the adventure). Would the other two be more likely Lance corporals or marines? (The rank structure in the Darrian Navy: Marine branch is marine, l.c., corporal, sergeant... and the first officer rank is an Lt.) Can't see any notes on squad formation so have just gone with what I felt like.