The submarine chaser then conducted tests under the auspices of the Bureau of Ships for the Underwater Sound Laboratory at New London, Connecticut for the remainder of August.

PC-1237 cleared that port on 1 September 1943 for points south; proceeding via Tompkinsville, the ship reached Miami soon thereafter and commenced shakedown training.

[2] PC-1237 began escorting convoys between Guantánamo Bay and Trinidad soon thereafter, occasionally touching at Kingston, Jamaica, and San Juan, Puerto Rico, during that time period.

At the beginning of February 1945, the submarine chaser was reassigned to temporary duty conducting tests at Antigua for the Naval Research Laboratory, an assignment that occupied her through the remainder of World War II and the early months of 1946.

[2] On 24 May 1946, PC-1237 departed San Juan and began a voyage that took her northward along the east coast of the United States, touching at Miami and Norfolk en route, and then up the St. Lawrence River to the Great Lakes.