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UTB' & RB-M Comparison 

41' UTB 45' RB-M

41' UTB

45' RB-M

 

Characteristics
Length: 40' 8" Length: 44' 10½"
Beam: 13' 5" Beam: 14' 7¾"
Draft: 4' 1" Draft: 3' 4"
Speed: 26 knots Speed: 42.5 knots
Range: 300 nautical miles at 18 knots Range: 250 nautical mitles at 30 knots
Towing: 100 tons Towing: 100 tons
Weather Limitations: 8' seas, 30 knot winds Weather Limitations: 8' seas, 30 knot winds
Survivability: -- Survivability: 12' seas, 50 knot winds

 

Capabilities

The crew requires visibility at night and in fog

No vision enhancement capability

 Infrared camera part of system
Boat actions limited Crew able to perform more effectively because of better vision at night and in fog

An individual must be recovered from the water
High gunwales on side of boat Recessed recovery well
Crew must work from aft deck to recover individual Boat can pull up alongside individual and crew does not have as far to reach for recovery

The boat must come alongside another vessel

No fenders as part of the hull Fendering system
Crew must deploy fenders Boat can come alongside without risk of damage from bumping or shifting, freeing the crew for other tasks

The boat is along side a larger vessel

Overhead of pilothouse is enclosed Overhead of pilothouse has a window that is made of polycarbonate which can withstand a great impact
Coxswain's visibility is restricted Coxswain has better visibility of the larger vessel

The boat must navigate through debris in the water
Appendages under the hull include propellers, rudders, shafts, and shaft struts Use of waterjets eliminates appendages under the hull
Collision between debris and appendages under the hull is difficult to avoid No appendages to damage. Waterjets can be backflushed to clear debris

A fishing vessel is taking on water
P-6 pump located in recessed deck below gunwale P-6 pump located on aft deck above gunwale
Crew must hoist pump above gunwale for delivery Crew can deliver pump quickly and with less effort

A boat is in distress close to shore

Draft: 4 feet, 1 inch Draft: 3 feet, 4 inches
The 41' UTB must consider the depth RB-M can conduct operations in shallower water and closer to shore like smaller boats but with more capabilities than the utility boat

An individual must be recovered from the water
Propeller propulsion system Jet drive system
The boat must manuever carefully to avoid striking the individual with the propellors The boat can quickly and safely approach the individual

A boat and its crew have sent out a distress call
Top Speed: 26 knots Top Speed: 42.5 knots
The 41' UTB reaches the victims in over 16 minutes The RB-M reaches the victims in under 10 minutes

After an extended marine event, an emergency requires immediate response, extending the duration of crew operations
Seating: 2 seats for crew of 4 Seating: 4 seats for crew of 4
Seating for helmsman and navigator only, forcing other crew members to stand resulting in fatigue Seating for all crew members minimizing fatigue thereby increasing crew performance and safety

The boat must operate in moderate, choppy seas
Longitudinal center of gravity aft of the midpoint of the boat Longitudinal center of gravity is at the midpoint of the boat
Crew experiences a rougher ride Crew experiences a smoother ride
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Last Modified 1/26/2012