"Eastwind", along with the other Wind-class icebreakers, was heavily armed for an icebreaker due to her design being crafted during World War II. Her main battery consisted of two twin-mount 5 in (130 mm) deck guns. Her anti-aircraft weaponry consisted of three quad-mounted Bofors 40 mm anti-aircraft autocannons and six Oerlikon 20 mm autocannons. She also carried six K-gun depth charge projectors and a Hedgehog as anti-submarine weapons. After the war her aft 5” mount was replaced by a helicopter deck, and by 1951 her forward mount had also been removed.