If I were cruising, I'd do sprouts, herbs, and fast-growing greens such as mesclun, and start experimenting with the potato bag and hanging tomatoes, depending how long I was in one place.
If anyone is growing tomatoes or other vegtables while cruising I'm interested in knowing the details. I've thought about herbs, tomatoes and a small varity of squash (such as rond de nice.) We will be on a catamaran
so I think we'll have the room.
My husband thinks I'm out of my mind to try to garden while cruising but as long as I keep mentioning chickens (for eggs) he forgets about the vegtables.