Gretchen Dunlap specifications

Owner/Operator:  Dunlap Towing Company, La Conner, Wash.
Builder: Hansen Boat Company, Everett, Wash.
Designer: Hockema & Whalen Associates, Inc, Seattle, Wash.
Dimensions: 101’ x 42’ x 20.6’
Mission: Primary: Ship handling/escort; Secondary: assist/rescue towing
Crew size: 6


Engines: (2) Caterpillar 3516C, 3,386 hp each at 1,800 rpm
Bollard pull: 90 tons
Vessel speed: 14 knots non-towing (estimated)
Propellers: 110-inch fixed-pitch propellers, 3-blade SS
Z-drive: Rolls-Royce model US 255/P30
Aux. generators: (2) Caterpillar C9, 250 ekW each, ship service; (1) Caterpillar C4.4, 76 ekW, auxiliary 

Deck equipment:

Winches: Markey DEPCF-52, 75-hp electric bow hawser winch; Markey TES-40, 75-hp electric stern tow winch
Cordage: 700’ of 10” circ. Spectra line, bow hawser; 2600’of 2.25” wire rope, stern tow winch
Fendering: Schuyler Cos., upper bow cylindrical/lower bow loop fenders, stern laminated/loop fenders
Shafting: Centa composite shafting, 10.43” diameter

Navigation gear: 

Radar: (2) Furuno FR8122
Compass: Simrad GC80 gyrocompass
AIS: Furuno FA-150
GPS: (2) Leica MX 610 
Autopilot: Simrad AP80
Sounders: (2) Furuno RD30


Radio: (2) SEA 157 DSC VHF, (1) SEA 245 SSB 
Hailer: (2) Furuno LH-3000
Satellite connection: Furuno Inmarsat MINI-C
Internal: Jotron multi station


Fuel: 85,869 gal.
Water: 13,176 gal.
Lube oil: 2,798 gal.


Pumps: DESMI Centrifugal S80-70-220N, 30 hp
Onboard fire suppression systems: FM-200 Fixed system with 700-pound agent CO2 portables

By Professional Mariner Staff