Before leaving port on an ocean tow, a tug captain should assure himself of all the following EXCEPT __________.

A
the towing hawser can be released quickly in an emergency
B
the correct navigation lights are rigged and operable on the tug and tow
C
an insurance underwriter has prepared a pre-sailing survey
D
a pick-up wire has been rigged on the tow in case of a breakaway.
E