San Francisco headquartered Bay Delta Maritime commissioned a sixth Delta Class Tug with Nichols Brothers Boat Builders out of Whidbey Island Washington. The Jensen designed M/V Delta Audrey, is a 100’x40’ z-drive tractor tug that is set to be delivered in June. The Tractor Tug is ABS load line certified and consists of a complete propulsion system that includes two Caterpillar 3516C diesel engines coupled to the Rolls Royce propulsion package. This system will produce 93 tons of bollard pull with a combined horsepower of 6800, giving the tug exceptional pulling power and maneuverability.
The vessel is outfitted with two Markey Winches; one forward for ship assist and one aft for towing. The two winch suite includes the Markey Model DEPCF-52-75HP Class II Hawser Winch and the TES-40 Tow Winch. The DEPCF-52 has a drum capacity for up to 750 ft. of 9-1/2” / 10” soft-line and has a rated performance of 30,800 LBS at 378 ft/min.
Included in the package is the Markey Render/Recover feature that allows for hands free operation at up to full rated line-speeds and line-tension. The TES-40 is sized for up to 2800 ft. of 2-1/4” wire rope (26 x 48 x 76) with an air-controlled drum brake and drum disconnect clutch and an 18” dia. warping head. The TES-40 rated performance at barrel layer is 154,000 lbs. stall line-pull and 110,200 lbs. running line-pull at 20 ft/min. Together they will share a single VFD drive panel and dynamic braking resistors, while having discrete wheelhouse controls for each winch. This reduces the impact of “below-deck” equipment on available space, as well as system cost while supporting full functionality of either winch.