The Collaborative International Dictionary
                    Harness cask
                    
                        
                
                                                                    Harness cask \Har"ness cask`\ (k[.a]sk`). (Naut.)
   A tub lashed to a vessel's deck and containing salted
   provisions for daily use; -- called also  harness tub. 
--W.
   C. Russell.
Wiktionary
                    harness cask
                    
                        
                
                                                                    n. (context nautical English) A tub lashed to a vessel's deck and containing salted provisions for daily use.
Usage examples of "harness cask".
Here you are in your house, and me still picking my salt meat out of the harness cask.