Most canned goods can be stored on board for 18 months or more. Exceptions are tomatoes, sauerkraut, citrus fruits, juices, and potatoes, which do not keep well. Select undented cans and store in a dry place. Dont bother removing labels or varnishing cans unless you expect them to get wet. With a marking pen, label tops of cans with contents and purchase date. Some canned meats (hams) and cheeses (Brie and Camembert) that are sold refrigerated are perishable and must be kept cool; others need no refrigeration, so check the label before purchase. Before using canned goods, look for signs of spoilage: bulging tops, rusted seams, light weight, or liquid stains on labels. If in doubt, throw it out without tasting.