Use "pack ice" in a sentence

1. Pack ice had clustered around the point where the coupling was to be made, and the operation was postponed

2. “Pack ice to the south gave us some tense moments, but we’re O

3. Pack ice: offshore ice moving with current and wind, closed or open, in the form of fields, floes or blocks

4. Seals are found on coasts, pack ice and in the open water