Right... it is important to point out that ships only use the "term" stage manager... they don't actually have a stage manger per se. they have sound techs and light techs, and sometimes stage hands working backstage.
No one (usually) plays the role of stage manager as in having the book and calling cues - or managing props, etc. As a lighting tech I used to call the cues on a ship years ago - but these days all shows are pretty much digitized anyway - there is nothing to call because it is all already synchronized.
What the ships want are sound & light techs who know how to use the latest technology. If you applied as a "stage manager" but you didn't list technology skills, you might have gone into the round file.