USS YP-45 was a wooden-hulled patrol vessel in commission in the fleet of the United States Coast Guard as CG-133 from 1925 to 1934, and in the fleet of the United States Navy as YP-45 from 1934 until 1945.
She was laid down at the Fall River, Massachusetts shipyard of the Crowninshield Shipbuilding Company, one of 203 "Six-Bitters" ordered by the United States Coast Guard.[1] [2] She was designed for long-range picket and patrol duty during Prohibition for postings 20 to 30 miles from shore.[3] The date of her launching and completion is uncertain although the class design was finalized in April 1924 and all of the Six-Bitters were commissioned by 1925.[3] She was commissioned in 1925 as CG-133.[1] [2] In 1934, she was transferred to the United States Navy and designated as a Yard Patrol Craft (YP).[2] In 1946, she was sold to the War Shipping Administration.[1]