Original sentence: Denmark, on the other hand, has a tradition of operating ice-strengthened patrol frigates in the Arctic.The Canadian Navy has used the dispute over Hans Island as an argument for investment in all-weather, ice-strengthened war ships, which Canada lacks
Edited sentence: Denmark, on the other hand, has a long tradition of operating ice-strengthened patrol frigates in the Arctic.The Canadian Navy has occasionally used the dispute over Hans Island as an argument for investment in all-weather, ice-strengthened war ships, which Canada lacks