Early in January 1945, "Bostwick" steamed to Narragansett Bay to screen while she conducted pilot qualifications. The destroyer escort returned to New York on 22 January and received orders to join in TG 22.4 for more hunter-killer activities. "Bostwick" met the task group at sea 600 miles south of Iceland on 16 February. The group, which consisted of 12 destroyer escorts and one escort carrier, formed a scouting line 90 miles long. Searching in vain for an enemy weather-reporting submarine, TG 22.4 soon found itself in winds of hurricane force. The mountainous seas died down as the wind lessened on the 22nd, but the escorts faced rising seas again before they reached port for refueling. "Bostwick" put into Hvalfjordür, Iceland, late on 25 February. TG 22.4 got underway again just three days later to track several German submarines reportedly heading west toward the Flemish Cap. While the weather had improved, but the seas remained heavy and continued to batter TG 22.4. "Bostwick" and her colleagues gratefully turned their duties overto TG 22.13 on 14 March.