Construction of the Signet Vigilant, Signet Maritime’s seventh ASD tug in less than four years, is underway at Signet Shipbuilding & Repair in Pascagoula, Miss. The 30-MT bollard pull, EPA Tier 3, ASD vessel will be the first Castleman Maritime design for Signet. Delivery is scheduled for July 2014. The new tug will operate from Signet’s International Operations Center in Ingleside, Texas, where it will perform rig escort, ship and barge assist work.
The 72’x 28′ Signet Vigilant will be powered by two MTU 8V-4000 M54 Tier 3 engines, rated at 1,200 hp at 1,800 rpm. The engines will drive two Rolls Royce US 155 P12-FP azimuth propulsion units. Deck machinery will include a Markey DEPC-32, 20-hp bow winch, and two Patterson WWP40E 40-ton facing winches on the stern. The hawser winch capacity is 525′ of 6.5″ circumference synthetic line.
The design and size will allow tug crews to assist marine vessels in tight quarters in the shallow-draft inland waterways. The environmentally friendly tug will have lower emissions and reduced fuel consumption to meet EPA Tier 3 marine emission regulations.