the destroyer escort arrived in her patrol zone on 9 july and refueled from on the 11th. she remained in the area from 12 to 18 july before proceeding to investigate a surface radar contact at 0024 on the 19th. the destroyer escort closed the range until she lost radar contact at 0045 and switched immediately to her sonar. "wyman" picked up a strong metallic echo and, at 0051, fired a full pattern of "hedgehog" projectiles, with negative results. she reloaded, opened the range, and then closed for a second attack, as closed in the meantime.