Pictured as: the Heidi (P and L Towing Company) Photo by: Birk Thomas

Built in 1965, by the Diesel Shipbuilding Company of Jacksonville, Florida (hull #123) as the Mako for Parallel Marine Incorporated of Weston, Florida.

In 2005, the tug was acquired by the P and L Towing Company of Miami, Florida. Where the tug was renamed as the Heidi.

In 2022, she was phased out of active service and was "laid up" at Miami, Florida.

Powered by two, Detroit Diesel 16V92 diesel engines. With Twin Disc MG-527 reduction gears, at a ratio of 5.17:1. Turning two, 64(in) by 44(in), four bladed, stainless steel, fixed pitch propellers. She is a twin screw tug, rated at 1,800 horsepower.

Her electrical service is provided by two, 60kW, Perkins MP-60 generator sets. The tug's capacities are 9,500 gallons of fuel, 35 gallons of lube oil, and 2,000 gallons of water.