She was laid down on 9 September 1941 by the Mathis Yacht Building Co., Camden, New Jersey. She was launched on 21 January 1942 and commissioned USS SC-527 on 11 May 1942. Her Coast Guard crew reported aboard on 28 May 1942. She was apparently assigned to duty with the Greenland Patrol and was home ported in Boston, Massachusetts. Her Record of Movements card indicates that by early 1944 she was still based in Boston and as of 8 April 1944 she was patrolling in Greenland waters (Arsuk Fjord). On 14 August 1944 she was reported as "avail" through 26 August 1944. On 11 September 1944 she was at Little Creek.

Commanding officers (list incomplete): LTJG John R. Rogers; LTJG Frank Cuetborick.

SC-527's Official Coast Guard History

From 19 to 22 July, 1942, the SC-527 was undergoing repairs at the Boston Navy Yard. On the 24th she departed Boston, escorting four trawlers for Casco Bay. Departing Casco Bay on July 31st she arrived at Sydney, August 14, 1942.

On August 5, 1942, the SC-527 and SC-528 were escorts of convoy SG-4 consisting of four merchant vessels and five other escorts which left Sydney, N. S., anchoring at Bluie West One, Greenland on the 10th. On the 12th the SC-527 proceeded to the assistance of the wrecked army schooner ARMSTRONG, returning to BW #1 August 15, 1942. She escorted a vessel convoy to Kungnat Bay on the 22nd and on the 27th escorted the DARIEN to BW #1. On September 1, 1942, the SC-527 took aboard six enlisted Coast Guard personnel for transportation to Cruncher Island, Sondre Stromfjord returning as escort of two vessels with the CGC ALGONQUIN to BW #2 arriving September 5, 1942. On the 11th cruised off last Greenland Banks to board Portuguese fishing vessels but sighting none anchored in Holsteinsborg Harbour. On the 12th she proceeded to Egedesminde Harbour, returning to Sondre Strom fjord on the 14th to board SS HALMA laying to on the fishing bank and bound to Egedesminde with supplies for the Greenland Government. Arriving at Sondre Stromfjord on the 18th she proceeded to Marrak Point on the 28th and on the 29th, was underway to join the USS BLUEBIRD and SS HALMA for Kungnat Bay. During October and November 1942 she was engaged in patrol duty in West Greenland waters, relieving the SC-528 on sound and lookout watch at Kungnat Bay on December 4, 1942. On the 10th she moored at Ivigtut until the 17th when she proceeded to Torssuktak, piloting the BELLE ISLE into Kungnat Bay on the 18th. Then she performed freight transportation duties until the end of the month.

From January 1, 1943 to May 20, 1943 the SC-527 was on patrol duty in Greenland waters, acting as guard ship at the entrance of Arsuk Fjord, transporting supplies and personnel between Greenland stations or anchoring in Kungnat Bay or at Ivigtut. On May 20, 1943, in company with SC-528 she departed Kungnat Bay with convoy GS-23 and stood into Boston Harbour on June 1, 1943, remaining at Charlestown Navy Yard until July 14, 1943 undergoing overhaul and repairs.

The SC-527 departed Boston July 14, 1943, in convoy with the USS PINTO, towing YNG-27 and YCK-2 in company with USS FALCON and SC- 528. On the 15th the FALCON collided with the SC-527's port beam and the SC-527 proceeded to Portland, Maine, and moored to survey the damage, returning to Charlestown Navy Yard for hull repairs until July 31, 1943. On August 1, 1943, she was underway to join a convoy for Halifax. N. S., the escort being additionally composed of 3 Canadian corvettes and the COMANCHE. On the 3rd the SC-527 was ordered to proceed to Halifax independently and moored. Proceeding to Sydney on the 7th and Argentia on 11th. After performing local escort out of Argentia, the SC-527 was underway on the 23rd with the RARITAN and TAMPA for Greenland, arriving at Grondal on the 28th. Here she performed local escort duty and stood sound watch until the end of 1943.

The SC-527 remained on patrol duty in Greenland waters until July 5, 1944. Her duties included ice breaking in the fjords, hospital transport duty, anti-submarine patrol, and local escort duty. On the 25th she proceeded, with SC-528, SC-704, and COMANCHE as guide, for Argentia arriving there on the 30th. On August 5, 1944, in company with SC-704, SC-528, and USS KAWEAH she proceeded to Boston where she was on availability through August 27, 1944.