I recently bought a little butane burner that we use to cook "Hot Pot" at home. Hot pot is cooked right at the table while you eat which is why you use a butane burner. Im thinking it might work well on the boat..
FYI, with Hot Pot, you have a large pan of water with pork (for example) bullion and spicy hot pot sauce (from an Asian market). Into the boiling water, you put thinly sliced meats (shubu shabu), different vegitables such as corn on the cob and cabbage, meat or fish balls, tofu, ect. As the food is cooking, you sit around the pot and pull out whatever seems to be "done". Each person has a dippiing bowl with garlic, chopped green onions, seseme oil, vinegar, ect and dips what they pulled out of the pot.
Real good, healthy and social meal. Also might be fun on the boat.