An ice canopy containing no large sky lights or other features which permit a submarine to surface.
Related Terms |
ICE CANOPY
From the point of view of the submariner, PACK ICE.
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FRIENDLY ICE
From the point of view of the submariner, an ice canopy containing many large skylights or other features which permit a submarine to surface. There must be more than 10 such features per 30 nautical miles along the submarine's track.
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