ICE PERFORMANCE TESTS OF USCGC HEALY

摘要

The ice performance tests of USCGC Healy were conducted in Baffin Bay in level first-year ice, multi-year ice and in one first-year ridge. Under full power of 30000 HP, USCGC Healy is capable of breaking 175-cm-thick ice continuously at a speed of about 2 knot (kt), and her speed in 137-cm-thick ice sheet was more than 3 kt, which is a design specification for the specified ice thickness. In 3.3-m-thick multi-year ice, she was able to advance a distance of 350 m by backing-and-ramming operations in about 65 minutes. She needed three backing-and-ramming operations to transit a first-year ridge, which had a 2-m-high sail and a 9-m-deep keel. Though not reported here, other types of tests included tests to break out of a channel and to advance through broken ice channels while going ahead and astern.