Canned fish canned tuna is used for sandwiches, 22 percent for salads, and 15 percent for casseroles and dried, packaged meal mixes. Other fish that is canned includes cod, mackerel, herring, and pilchard (a type of sardine). Canned fish Canned fish are fish which have been processed, sealed in an airtight container such as a sealed tin can, and subjected to heat. Canning is a method of preserving food, and provides a typical shelf life ranging from one to five years. Fish have low acidity, levels at which microbes can flourish. From a public safety point of view, foods with low acidity
USS Skipjack (SSN-585) the summer of 1988 and the crew prepared for a UNITAS cruise to South America. "Skipjack" left in September and visited the Naval Base in Puerto Rico; Caracas, Venezuela (anchored out); Cartagena, Colombia and then transited the Panama Canal. While at a Naval Base on the Pacific side, one motor-generator suffered an unrepairable casualty. "Skipjack" left UNITAS, re-transited the canal and headed to Groton, where she entered dry-dock for repairs. "Skipjack"'s authorization to dive expired in March 1989 since it was not cost efficient to inspect the hull in 1987 for a ship scheduled to be decommissioned. She had just