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

Correct Answer: Option A — an insurance underwriter has prepared a pre-sailing survey

While a master must ensure the safety of the tow, navigation lights, and emergency release capabilities, an insurance underwriter's pre-sailing survey is a commercial requirement, not a regulatory safety prerequisite for departure. The master's primary responsibility is the physical and operational readiness of the vessel and tow.