From the point of view of the submariner, an icy canopy containing many large ice skylights or other features which permit a submarine to surface; there must be more than ten such features per 37 kilo
meters (30 nautical miles) along the submarine's track.
From the point of view of the submariner, an ice canopy containing many large skylights or other features that permit a submarine to surface. There must be more than ten such features per 30 n mi (56
km) along the submarine's track.
Sea ice terminology that describes an ice canopy containing many large skylights or other features, which permits a submarine to surface. There must be more than 10 such features per 30 nautical miles
(56 km) along the submarine's track.
From the point of view of the submariner, an ice canopy containing many large skylights or other features that permit a submarine to surface. There must be more than 10 such features per 56 km (30 nau
tical miles) along the submarine's track.
From the point of view of the submariner, an ice canopy containing many large ice skylights or other features which permit a submarine to surface. There must be more than ten such features per 30 naut
ical miles along the submarine's track.