"I don't know if I can make a rafter, but we should get some wood for a raft." She looked around, still holding on to the Doctor, for a place where they could get rope or any other supplies. "I suppose you don't have your screwdriver? That would be too convenient." She started making a list of things they would need in the sand with her finger.
'Rope Logs Sail Food/clean water or water purifier'
"We don't know how long it will take" she tried to explain the end of her list