I respond here to bring back useful info to a current discussion.
A rulebeater tug or push boat under 26 feet does not meet the legal definition of a “towing vessel.”
Therefore, seatime on a vessel under 26 feet is not counted as towing vessel time.
Such seatime may be counted toward AB or Master 100, both of which are useful credentials to have.
More importantly, many companies operate rulebeater tugs under 26 feet AND larger inspected towing vessels. Skill building experience on a rulebeater tug can be valuable and lead to new opportunities.
It’s great to obtain a Master of Towing endorsement, but it’s even better to know what to do with it.