We toured an old deisel sub (in Portland Oregon) a few years ago and they told us about life aboard the boat....They had LOTS of canned food, bags of rice, potatoes......the usual staples......one thing we did find funny was that they would load the canned goods and make a floor out of them and walk on top of them. As they used them (consumed the contents) they had more (head) room to walk. But they didn't carry anything "special".