I can fold toilet paper into a little fan.
Yep. We do that.
Stews : girls. Deckies : guys.
Not my picture of a yacht engine room:
While hands on learning is the best for this, it’s a good general overview of the mechanics of boats - including jet skis and tender, the items typically required to be cared for by the deck crew. Additional, taking extra courses like this can show a bit of commitment to the industry - and differentiate yourself from the backpackers that fall into it looking for a quick season of cash.