Right, but there usually were not that many ships of the line onHans Rancke said:So 64 or more marines on a Line-of-Battle ship. That's enough for two officers, one of which would be a captain.
the seas, most of the time the big ships were kept in ordinary to
save the money for crews and repairs, which is why I considered
the situation with two captains as "a somewhat rare event" in my
post above.