You've got 16X my tonnage, so your way above my pay grade
. Renewing a 100 ton doesn't involve dunking the applicant.
I sat (or should I say) swam in for part of STCW to get the experience. I learned that survival suits and overturned life rafts are no picnic even in a heated indoor pool at my slightly less advanced age
. Gumby suits are very restrictive, and life rafts aren't easy to board from the water. The dunking you are talking about is WAY more extreme!
I think brain counts for more than brawn, and experience has the highest value. Respect and power to the old guys