Friendly iceBy Samantha Lake / 18/04/2024 ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ« Back to Glossary IndexAn ice canopy containing many large skylights or other features, permits a submarine to surface. There must be more than 10 such features per 30 nautical miles (56 km) along the submarine’s track. « Back to Glossary Index
