In sea ice navigation, making headway through an ice pack by boring, breaking, and slewing.
Related Terms |
HEADWAY
The forward motion of a boat. Opposite of sternway.
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CAST
1. To turn a ship in her own length. 2. To turn a ship to a desired direction without gaining headway or sternway. 3. To take a sounding with the lead.
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HEAVE TO
To stop the vessel making headway in bad weather. To back the foresail so the vessel stands nearly still.
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HOVE-TO
A condition the vessel is said to be in when it is heading into the wind and sea but making little or no headway
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THREE SHEETS TO THE WIND
A ship running free, barely able to keep headway and control. Drunk.
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HUMMOCKING
The pressure process by which sea ice is forced into hummocks. When the floes rotate in the process, it is called SCREWING.
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HUMMOCKED ICE
Sea ice piled haphazardly one piece over another to form an uneven surface. When weathered, hummocked ice has the appearance of smooth hillocks.
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ICE JAM
An accumulation of broken river ice or sea ice caught in a narrow channel
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ICE EDGE
The demarcation at any given time between the open sea and sea ice of any kind, whether fast or drifting.
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ICE MASSIF
A concentration of sea ice covering an area of hundreds of kilometers, which is found in the same region every summer
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