What type of submarine was XXX classified as?
USCGC Westwind (WAGB-281)
USCGC Westwind (WAGB-281) was a Wind-class icebreaker that served in the United States Coast Guard as USCGC Westwind (WAG-281), the Soviet Navy as the Severni Polius, and again in the U.S. Coast Guard as USCGC Westwind (WAGB-281).
Wind-class icebreaker