11. Scientific settlements were established on the drift ice and carried thousands of kilometres by ice floes. 12. It was designed to protect the canal from floods and drift ice , and entered service in 1873. 13. The Sea of Okhotsk is the southernmost area in the Northern hemisphere where drift ice may be observed. 14. In March 1927, Australian polar explorer, George Hubert Wilkins and Eielson explored the drift ice north of Alaska. 15. It was constructed in 1936 as a staging area for the world's first drift ice station, North Pole-1. 16. During the winter, passage through the Sea of Okhotsk is often complicated by large floes of drift ice . 17. In snow-covered ice and drift ice " Murtaja " could not operate efficiently due to her inefficient hull form. 18. Their northern range is limited by ice, as sea otters can survive amidst drift ice but not land-fast ice. 19. Drift ice can create problems during fishing season, and the Danish government has not invested in large-scale fish processing plants.20. In temperate and tropical areas, they barrier reefs, although they may reside among drift ice or in sandy, muddy, or silty areas.
