American Commercial Barge Line (ACBL), Jeffersonville, Ind., christened its new 200'x50'x12'6" towboat Mariner on the Mississippi River in an out-of-the-ordinary ceremony in New Orleans. Company officials said Mariner is the largest towboat to be built in the U.S. in 50 years.
Constructed by C&C Marine and Repair, Belle Chasse, La., the 11,000-hp boat has an operating draft of 11'6", eight 65-ton winches, dual steering and flanking rudders, and can adjust its operating draft by up to 18" to navigate shallow waters during low-river levels.
The boat was designed by CT Marine, Edgecomb, Maine. The Mariner is the largest twin-screw towboat "on the planet," Christian Townsend, CT Marine's owner, said in a WorkBoat interview earlier this year. (Townsend was unable to be in New Orleans for the christening.)
"We have spent four years and 24,000-plus hours of engineering on this project. She is the largest twin screw ever built for the rivers," Townsend said.
Main propulsion comes from twin Caterpillar C280-12 diesel engines connected to Hung Shin 5-bladed wheels through Reinjes WAF 6755 marine gears supplied by Karl Senner. Steering and controls are the responsibility of CT Marine's TwinDIFF system.
Capacities include 117,192 gals. of fuel oil; 17,250 gals. consumable potable water; 161,585 non-consumable water; 506 gals. hydraulic oil; 2,300 gals. coolant; and a 513 gal. genset day tank. Additionally, Mariner has accommodations for a 12-person crew and is fitted with a single guest room.
The new towboat is ABS certified and USCG classed, Subchapter M.
The boat can push up to 64 barges carrying more than 75,000 tons of cargo in a single tow. And Mariner’s size increases efficiency by 20% compared to smaller boats, ACBL officials said, adding that the boat is the company’s new flagship vessel, designed to exceed industry standards in power, efficiency, and reliability.