USCGC Point Marone (WPB-82331) was an 82-foot (25 m) Point class cutter constructed at the Coast Guard Yard at Curtis Bay, Maryland in 1962 for use as a law enforcement and search and rescue patrol boat. Since the Coast Guard policy in 1962 was not to name cutters under 100 feet (30 m) in length, it was designated as WPB-82331 when commissioned and acquired the name Point Marone in January 1964 when the Coast Guard started naming all cutters longer than 65 feet (20 m).
 Point Marone was built to accommodate an 8-man crew. She was powered by two 600 hp (447 kW) VT600 Cummins diesel main drive engines and had two five-bladed 42 in (1.1 m) propellers. The main drive engines were later replaced by 800 hp (597 kW) VT800 Cummins engines. Water tank capacity was 1,550 U.S. gallons (5,900 L) and fuel tank capacity was 1,840 U.S. gallons (7,000 L) at 95% full. Engine exhaust was ported through the transom rather than through a conventional stack and this permitted a 360 degree view from the bridge; a feature that was very useful in search and rescue work as well as a combat environment.
 The design specifications for Point Marone included a steel hull for durability and an aluminum superstructure and longitudinally framed construction was used to save weight. Ease of operation with a small crew size was possible because of the non-manned main drive engine spaces. Controls and alarms located on the bridge allowed one man operation of the cutter thus eliminating a live engineer watch in the engine room. Because of design, four men could operate the cutter; however, the need for resting watchstanders brought the crew size to eight men for normal domestic service. The screws were designed for ease of replacement and could be changed without removing the cutter from the water. A clutch-in idle speed of three knots helped to conserve fuel on lengthy patrols and an eighteen knot maximum speed could get the cutter on scene quickly. Air-conditioned interior spaces were a part of the original design for the Point class cutter. Interior access to the deckhouse was through a watertight door on the starboard side aft of the deckhouse. The deckhouse contained the cabin for the officer-in-charge and the executive petty officer. The deckhouse also included a small arms locker, scuttlebutt, a small desk and head. Access to the lower deck and engine room was down a ladder. At the bottom of the ladder was the galley, mess and recreation deck. A watertight door at the front of the mess bulkhead led to the main crew quarters which was ten feet long and included six bunks that could be stowed, three bunks on each side. Forward of the bunks was the crew's head complete with a compact sink, shower and commode. Accommodations for a 13-man crew were installed for Vietnam service.
 After delivery in 1962, Point Marone was assigned a homeport of San Pedro, California, where she served as a law enforcement and search and rescue patrol boat.
 At the request of the United States Navy, in April 1965, she was alerted for service in South Vietnam and assigned to Coast Guard Squadron One in support of Operation Market Time along with 16 other Point class cutters. While the crew completed overseas training and weapons qualifications at Coast Guard Island and Camp Parks, California, Point Marone was loaded onto a merchant ship, and transported to Subic Bay, Philippines in May 1965 where she was refitted for combat service. Shipyard modifications included installation of new single-sideband radio equipment, additional floodlights, small arms lockers, bunks, additional sound-powered phone circuits, and the addition of four M2 machine guns. The original bow-mounted machine gun was replaced with a combination over-under .50 caliber machine gun/81 mm trigger-fired mortar that had been developed by the Coast Guard for service in Vietnam.  For service in Vietnam, two officers were added to the crew complement to add seniority to the crew in the mission of interdicting vessels at sea.
 Point Marone was assigned to Division 11 of Squadron One to be based at An Thoi Naval Base, on the southern tip of Phú Quốc island along with USCGC Point Banks, USCGC Point Clear, USCGC Point Comfort, USCGC Point Garnet, USCGC Point Glover, USCGC Point Grey, USCGC Point Mast and USCGC Point Young. After sea trials, the Division left Subic Bay for An Thoi on 17 July 1965 in the company of USS Floyd County, their temporary support ship. After almost two weeks at sea, they arrived at their new duty station on 1 August and began patrolling the waters in the Gulf of Thailand near the Cà Mau Peninsula. Duty consisted of boarding Vietnamese junks to search for contraband weapons and ammunition and check the identification papers of persons on board. During September 1965, USS Krishna, a repair ship outfitted for the repair of WPB's relieved the Floyd County. Also during this time, the WPB's were directed to paint the hulls and superstructures formula 20 deck gray to cover the stateside white paint. This increased the effectiveness of night patrols.
 While on patrol in the Gulf of Thailand near the Cambodian border on the night of 19 September 1965 Point Marone intercepted a suspicious junk operating near Ha Tien and warned it to stop for boarding. After receiving fire from the junk she returned fire, and with assistance from Point Glover they sank the junk in 15-foot (4.6 m) of water. After the junk was recovered the following day, rifles, grenades, ammunition and documents were discovered. The only survivor of the crew of the junk provided intelligence which led to a raid on Hon Mot that was conducted on 26 September. Point Marone participated in the raid along with cutters Point Comfort and Point Grey by transporting Civilian Irregular Defense Group (CIDG) mercenaries and their Special Forces advisors to the raid and providing fire support with the 81 mm mortar.
 On 4 August 1970, Point Marone and USCGC Point Cypress, conducted the last mission for Squadron One on the Co Chien River. The cutters each carried fifty Kit Carson Scouts and their ARVN advisors along with the full 13 man Republic of Vietnam Navy (RVNN) replacement crew aboard for their final check ride for the Vietnamization program. In one of the canals that intersected with the river Point Marone hit a command detonated mine wounding several on board and causing several holes below the waterline. The mission was cancelled and Point Cypress escorted her back to the base at Cat Lo.
 On 15 August 1970, Point Marone along with Point Cypress were turned over to the RVNN; the last two of the 26 Point-class cutters assigned to Squadron One. Point Marone was recommissioned as RVNS Trương Ba (HQ-725).