Pull a vessel (3)
I believe the answer is:
tug
I believe this is a double definition.
'pull' is the first definition.
(to tug something is to pull it)
'a vessel' is the second definition.
(tug is a kind of vessel)
(Other definitions for tug that I've seen before include "Small boat designed to pull larger ships" , "jerk" , "Pull at, or a boat that pulls" , "Small boat for pulling others" , "Pull vigorously, yank" .)