Powerful Tug For The Mississippi

26 November 2019

Bisso Towboat Co. in Luling, Louisiana, USA, announced the delivery of its first EPA Tier 4 Final and Subchapter M azimuth stern drive (ASD) tractor tug. At 6008 bhp, the Andrew S. is the most powerful Tier 4 tug on the Mississippi River, according Caterpillar Marine, which supplied two Cat 3516E main engines, each generating 3004 bhp at 1800 rpm and incorporating a selective catalyst reduction (SCR) system.

To become both EPA Tier 4 Final and Subchapter M compliant, and meet their increased power requirements, Bisso’s team worked with several companies. Caterpillar Marine Territory Sales Manager, Charlson Smith, collaborated with Bisso to select the engine package for the Andrew S.

“Our 3500 series engine is compact and reliable. Five of Bisso’s tractor tugs have 3516s in them already,” said Smith.

The Andrew S. measures 100 x 38 x 13.5 ft. and has an estimated bollard pull of 84 tons. Additional features of the tug include U.S. Coast Guard-approved engine room monitoring and fire/alarm systems, a fixed CO2 fire extinguishing system, and both the engine room and crew quarters have soundproof insulation.

Main Iron Works Inc., located in Houma, Louisiana, constructed the tug. With the Andrew S., Bisso now has a total of 13 tugs a part of their fleet, eight of which are ASD tractor tugs, making the company the largest fleet owner of ASD tractor tugs on the Mississippi River.

Bisso plans to christen the Andrew S. on the Mississippi River during the International WorkBoat Show in New Orleans, Louisiana, USA, on Dec. 5. Additionally, that day, the tug will be available for attendees to visit. To learn more about Caterpillar’s Tier 4 Final solutions and SCR system, stop by the Caterpillar exhibit at WorkBoat, booth #2801.


Receive the information you need when you need it through our world-leading magazines, newsletters and daily briefings.

Sign up


The trusted reference and buyer’s guide for 83 years

The original “desktop search engine,” guiding nearly 10,000 users in more than 90 countries it is the primary reference for specifications and details on all the components that go into engine systems.

Visit Now

Becky Schultz Vice President of Content Tel: +1 480 408 9774 E-mail: [email protected]
Julian Buckley Editor Tel: +44 (0) 1892 784088 E-mail: [email protected]
Chad Elmore Managing Editor Tel: +1 262 754 4114 E-mail: [email protected]
Josh Kunz Power Progress Brand Manager Tel: +1 414 379 2672 E-mail: [email protected]
Roberta Prandi Power Progress International Brand Manager Tel: +39 334 6538183 E-mail: [email protected]