Ice anchor

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(Naut.) a grapnel for mooring a vessel to a field of ice.

See also: Ice

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Not even an ice anchor and my weight on the spiked platform which served as the brakes could stop them dragging the sled a few inches.
We have also had the added bonus of finding three ice anchors from The Victory."
Mee said his group had found the remains of the steam engine and three ice anchors from the Victory.