It would greatly depend on where you are trying to ship out. Inland, coastwise towing has small boats (relatively) small quarters. Usually sharing a room. The typical crew will ride a woman until/unless she DOES the job. I have met or sailed with several women over my career. Most were out for the adventure, and weren’t ‘in it for the long haul’.
However one of the best deckhands I had was a tugboater from Kingston ny. But her lack of upper body strength limited her to small tugs, and small gear. When throwing around a 105 ton bow shackle on the back deck, or swinging a 15 lb sledge to knock a pin out is not the time to figure out this is not the career you want. This is when I have seen animosity develop. In a pinch, everyone must be up to the task, and sometimes (but not often) the task is herculean.
Tugs have small cramped quarters, and living on a boat with from 4 to 6 guys can be a pain. (Its sometimes a bitch when its all guys anyway, so it has nothing to do with gender)
The inland push fleet has to make and break tow, often several times a watch, and part of this is lugging 125 lb ‘steam boat ratchets’ around (with accompanying wires and shackles and cheater bars) If you cant keep up, then you probably shouldn’t show up. There are harbor assist boats, where the work is more mundane, and you won’t have to do as much making and breaking tow. But sometimes even a harbor boat will be called upon to actually go tow something.
However if you want to ‘ship out’ on ships, there is a better way of life. However just ask most of the recent maritime graduates how many berths are available. Not many!
You could investigate the inland dinner/ cruise fleet. But I HATE dealing with passengers. JMHO.
and someone else mentioned it, but you are CREW. gender is irrelevant. (as in I am Crew)