At what temperature does sea water freeze?

06/11/2013, 64 49.7’S:063 29.8’W, Half a mile from Port Lockroy

written by Bertie Whitley

Ice on the bow

Ice on the bow

How cold does it have to be for sea spray to freeze on a boat? We’re not actually sure as our thermometer gave up the ghost around -6C and that was a good few days ago when it was still practically tropical. Frozen sea spray on all the guard wires, shrouds, lines and just about everything does make for some impressive photos, even if it does make boat maneuvers a bit time consuming, what with having to chip ice off and dig out any lines, winches, cleats you might need. It’s also not so fun when the frozen sea spray is on your face, or any other part of you, for that matter. Our first experience of seawater freezing happened overnight in the Drake, about 50Nm North of Smith Island. Caution being the better part of valor we decided to hove to through the night rather than push on through to try and find shelter. Pelagic then stoically rode out a storm which saw gusts as high as 60kts. True southern ocean conditions saw gigantic waves and icy seas. The crew, now almost all over their seasickness, seemed to take it all in their stride. 36 hours later when the storm had completely abated, there was a valiant de-icing operation as we motored down the Bransfield in flat water… continue reading

About David

David Roberts is the skipper of sailing yacht Pelagic, a charter expedition yacht working in Antarctica, South Georgia, the Falkland Islands, Tierra del Fuego and Cape Horn areas.
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