1) Caulked 2) Equipped 3) Fit for a sea voyage 4) Fit for a voyage 5) Fit to be untied 6) Fitted for a voyage 7) Fitted out 8) Leakproof 9) Ready for sailing 10) Safe to push off 11) Shipshape 12) Tight 13) Watertight Found on https://www.crosswordclues.com/clue/seaworthy
Sea'wor`thy adjective Fit for a voyage; worthy of being trusted to transport a cargo with safety; as, a seaworthy ship. Found on http://www.encyclo.co.uk/webster/S/50