sentences:  "Sentry" was laid down on 16 May 1943 by the Winslow Marine Railway and Shipbuilding Co., Seattle, Washington; launched on 15 August 1943 sponsored by Miss Nanette L. Pratt, and commissioned on 30 May 1944, Lt. Thomas R. Fonick in command.After shakedown, "Sentry" sailed from San Francisco, California, on 28 August 1944 and joined the U.S. 7th Fleet at Manus on 6 October for the Leyte invasion.She arrived off the Leyte beaches on 17 October and carried out a three-day pre-invasion sweep.