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Cutter Characteristics


The ship was designed with icebreaking in mind. Its high horsepower, specialized hull design, and “slick” bottom paint make this cutter one of the most efficient icebreakers in the world today. The cutter’s hull lubrication system, or “bubbler”, further increases its icebreaking capabilities. This system pumps air through openings in the hull below the waterline reducing ice friction, allowing the cutter to pass easily through ice fields. At full power and using all four sections of the “bubbler system” manifolds, MOBILE BAY is capable of breaking up to 30-inches of ice in continuous mode.

In addition to the duty of icebreaking, when notched into CGB 12002, MOBLE BAY’s ample horsepower combined with the barge’s bowthruster create a highly maneuverable platform for servicing floating aids to navigation, or what is commonly called buoys. CGB 12002’s 20-ton capacity crane and large buoy deck area enable the Tug & Barge combination to effectively maintain over 100 buoys in Green Bay and upper Lake Michigan.


Overall Specifications

      WTGB-103 Tug        CGC 12002 Barge    
Length 140 ft 120 ft 
Beam 37.5 ft 50 ft 
Draft 12.5 ft 4.5 ft 
Freeboard 6 ft 5 ft 
Displacement 690 tons 900 tons
Freshwater Capacity 670 gal 16500 gal 
Fuel Capacity 22340 gal 34350 gal 
Horsepower 2500 HP   
Cruising Speed 12 kts  
Maximum Speed 14.7 kts  


Personnel Compliment

Officers 5
Chief Petty Officers 2
Enlisted Crew 23


Ship's and Barge's Features

WTGB-103 Tug 12002 Barge
Diesel Electric Propulsion 265 HP Bow Thruster
Single Propeller (8.5' Diameter) 20 ton Hydraulic Crane
Hull Lubrication System 21 ft Aids to Navigation Boat
5/8" Steel Ice Belt   
"Low Friction" Underwater Hull Paint   
17 ft Utility Boat   


Last Modified 12/21/2016