Related Clues:
- Drifting chunk of ice
- Layer of frozen water
- Mass carved from a glacier
- Polar explorer's concern
- Occasionally, finches followed maritime feature
- Water-borne sheet detached from an ice field
- I caught bird that's pulled up lettuce
- Liner's peril
- Perch for a penguin
- Diving bird caught one coming up, big thing mostly submerged
- Current caught diving waterbird coming back - it's seen as a danger to shipping
- Arctic mass (2 words)
- Small ice field
- Frozen sea mass
- Field of drifting ice