Built in 1981, by Diamond Manufacturing Incorporated of Savannah, Georgia (hull #478) as the Belcher Port Everglades for the the Belcher Towing Company of Tampa, Florida.
She was "married" with the 640(ft), by 39(ft) 417,000(bbls) barge, the Belcher Barge #102. which was constructed in 1981 by Galveston Shipbuilding Incorporated of Galveston, Texas for Belcher Towing Company of Miami, Florida.
In 1990, the unit was acquired by the Coastal Tug and Barge Company of Miami, Florida. Where the tug was renamed as the Coastal Port Everglades. And, her barge was renamed as the Energy Explorer.
In 1997, the unit was acquired by the Maritrans Operating Partnership Incorporated of Tampa, Florida. Where the tug retained her name. And, her barge was renamed as the Ocean 400.
In 2000, the tug was acquired by Seawave Maritime Limited of Piraeus, Greece. Where she was renamed as the Unbelievable.
In 2005, she was acquired by Superior Trading Incorporated of Piraeus, Greece. Where she was renamed as the Mighty Deliverer.
In 2007, the tug was acquired by Guardian Navigation Incorporated of Panama City, Panama. Where she retained her name.
In 2008, she was acquired by the Yoshida Trading Corporation of Davao City of the Davao Region, Philippines. Where the tug was renamed as the Blue Whale 110.
In 2009, the Yoshida Trading Corporation renamed the tug as the Ocean Pearl.
In 2009, the tug sank. She was powered by a 38(ft) tall single, Burmeister and Wain 7L67GF turbocharged, slow-speed, direct reversing, crosshead diesel engines. The engines where custom built in Copenhagen, Denmark, by Burmeister and Wain. She was a single screw tug, rated at 15,200 horsepower.