Killick has long been a favourite character of mine in Patrick O'Brian's "Aubrey/Maturin" series - I was pleasantly surprised to find that a word I could never catch in Peter Bellamy's singing of 'The Gallant Frigate Amphitrite" (aka 'Rounding the Horn') is 'killick':

    When we got round the horn my boys, we had some glorious days
    And very soon our killick dropped in Valparaiso bay

Previously I had heard this as 'keel it did drop', etc. Does anyone know what a killick is?