| Term: | Hostile ice |
| Definition: | From the point of view of the submariner, an ice canopy containing no large ice skylights or other features which permit a submarine to surface. |
| Term: | Hostile ice |
| Definition: | From the point of view of the submariner, an ice canopy containing no large skylights or other features that permit a submariner to surface. |
| Term: | Hostile ice |
| Definition: | Sea ice terminology that describes an ice canopy containing no large skylights or other features, and as a result submarines are unable to surface. |
| Term: | Hostile ice |
| Definition: | From the point of view of the submariner, an ice canopy containing no large ice skylights or other features which permit a submarine to surface. |