Her propelling plant consists of geared turbines supplied with steam from oil fired boilers and driving twin screws. In the ship made a special practice cruise with cadets from the Coast Guard Academy, and in spent about three months on temporary duty with the Navy, engaging in joint maneuvers. Later that year the Bibb joined a destroyer squadron for the assistance of shipping in the North Atlantic. In the winter of she was part of the Grand Banks Patrol. During and much of her time was spent on weather patrol.
She had barely arrived at Casco Bay on April 3rd, when she was underway again searching for a Navy plane that had been forced down at sea. The search was unsuccessful but the cutter depth charged another submarine contact. Proceeding to the area she searched with the Modoc without results. Two depth charges were dropped on a sound contact on the 7th and the search continued for two hours before rejoining the convoy.
Again on the 13th, off Skagie Point, Iceland, a charge was dropped on a doubtful contact. Dropping a lb. While circling the area to renew contact a whale and school of porpoises was also encountered. The search was discontinued. This convoy was part of an east bound trans-Atlantic convoy which had broken off and was headed for Iceland.
Two depth charges were fired on an underseas contact with no visible effects. On the 9th the Roselys sank a floating mine and later dropped one charge on a doubtful contact.
The Iceland Unit, consisting of 7 ships, detached from the main convoy at The Bibb was again underway on August 31, screening the port bow of the eastbound trans-Atlantic convoy SC At , a large explosion was observed on a ship in the convoy. Shortly after this flames were observed on a second ship, just ahead of the first one.
