1) Constant 2) Firm 3) Firm in principle 4) French word used in English 5) Loyal 6) Loyally unflinching 7) Not fickle 8) Stay faithful 9) Steadfast 10) Stop the flow of a liquid 11) Stop with the firm 12) To stop the flow of 13) Trusty 14) Unswerving 15) Very loyal and committed Found on https://www.crosswordclues.com/clue/staunch
The USS Staunch was an American Admirable Class minesweeper of 625 tons displacement launched in 1944. The USS Staunch was powered by diesel engines providing a top speed of 14.5 knots and carried a complement of 104. She was armed with one 3 inch dual-purpose gun and four 40 mm anti-aircraft guns. Found on http://www.probertencyclopaedia.com/browse/RSA.HTM