USCG COXSWAIN UPDATED FINALS PAPER QUESTIONS
AND SOLUTIONS GUARANTEE A+
✔✔Unequal Blade Thrust - ✔✔Due to the angle of the propeller shaft, the pitch angle is
different for ascending and descending propeller blades which creates more thrust.
✔✔Side Force - ✔✔Causes stern to move sideways in the direction of propeller rotation
✔✔Maneuvering Alongside Another Vessel - ✔✔When determining approach, the
following conditions should be considered:
1) Prevailing weather
2) Currents
3) Location
4) Vessel conditions
5) Vessel sizes
6) Traffic density
✔✔Thrust and Directional Control - ✔✔Vessel control is through the nozzle-directed
thrust. To attain
forward motion, the thrust exits directly astern. For turning, the nozzle pivots (as a stern
drive) to provide a transverse thrust component that moves the stern
✔✔Zero Thrust - ✔✔Center the helm and throttles, adjust the bucket to a point where
thrust maintains position.
✔✔Operational Characteristics of the OTH - ✔✔Max Speed: 40 Knots
Stopping Characteristics: Approximately 1 boat length at cruising speed
Cruising RPM's: 2600 RPM
Maximum Range: 227 Nautical Miles with 10% Fuel Reserve
Minimum Crew: 2 (Coxswain and Engineer)
Maximum POB Capacity: 13 (5 crew and 8 passengers)
Max Seas: 11 foot
Max Winds: 30 knots
Max Size Boat That Can Be Towed: 3,000 pounds on tow bit
Ice Breaking Capability: None
, Surf Capability: None
Turning Point: Turns at the Water Jet
✔✔Operational Characteristics of the CBL - ✔✔Max Speed: 36 Knots
Stopping Characteristics: Approximately 1 boat length at cruising speed
Cruising RPM's: 2300 RPM
Max Range: 200 Nautical Miles
Minimum Crew: 2 (coxswain and crew member)
Maximum POB Capacity: 13 (5 crew and 8 passengers)
Max Seas: 6 foot
Max Wind: 35 knots
Max size boat that can be towed: Similar Sized Vessel
Ice Breaking Capability: None
Surf Capability: None
Turning Point: Turns at mid-ship, just behind the console
✔✔Components of OTH Propulsion System - ✔✔Engine: Cummins QSB 6.7 Litre 480
Horsepower Diesel coupled to Hamilton Waterjet
Engine Horsepower: 480
Waterjet Nomeclature: Hamilton HJ292 Waterjet integrated package with
Steering/Reverse Mechanism, Jet Mounted Hydraulic Control System, and Dry Run
System.
Location of Jet Nozzle: Aft, just past the transom
Max Shaft RPM: 3300 RPM
Type of Fuel Used: Number 1 Diesel, NUmber 2 Diesel, Jet A, A-1, JP5, JP8
Fuel Tank Capacity: 114 Gallons (twin 57 gallon fuel tanks)
Usable Fuel Tank Capacity: 90% or 100 gallons
AND SOLUTIONS GUARANTEE A+
✔✔Unequal Blade Thrust - ✔✔Due to the angle of the propeller shaft, the pitch angle is
different for ascending and descending propeller blades which creates more thrust.
✔✔Side Force - ✔✔Causes stern to move sideways in the direction of propeller rotation
✔✔Maneuvering Alongside Another Vessel - ✔✔When determining approach, the
following conditions should be considered:
1) Prevailing weather
2) Currents
3) Location
4) Vessel conditions
5) Vessel sizes
6) Traffic density
✔✔Thrust and Directional Control - ✔✔Vessel control is through the nozzle-directed
thrust. To attain
forward motion, the thrust exits directly astern. For turning, the nozzle pivots (as a stern
drive) to provide a transverse thrust component that moves the stern
✔✔Zero Thrust - ✔✔Center the helm and throttles, adjust the bucket to a point where
thrust maintains position.
✔✔Operational Characteristics of the OTH - ✔✔Max Speed: 40 Knots
Stopping Characteristics: Approximately 1 boat length at cruising speed
Cruising RPM's: 2600 RPM
Maximum Range: 227 Nautical Miles with 10% Fuel Reserve
Minimum Crew: 2 (Coxswain and Engineer)
Maximum POB Capacity: 13 (5 crew and 8 passengers)
Max Seas: 11 foot
Max Winds: 30 knots
Max Size Boat That Can Be Towed: 3,000 pounds on tow bit
Ice Breaking Capability: None
, Surf Capability: None
Turning Point: Turns at the Water Jet
✔✔Operational Characteristics of the CBL - ✔✔Max Speed: 36 Knots
Stopping Characteristics: Approximately 1 boat length at cruising speed
Cruising RPM's: 2300 RPM
Max Range: 200 Nautical Miles
Minimum Crew: 2 (coxswain and crew member)
Maximum POB Capacity: 13 (5 crew and 8 passengers)
Max Seas: 6 foot
Max Wind: 35 knots
Max size boat that can be towed: Similar Sized Vessel
Ice Breaking Capability: None
Surf Capability: None
Turning Point: Turns at mid-ship, just behind the console
✔✔Components of OTH Propulsion System - ✔✔Engine: Cummins QSB 6.7 Litre 480
Horsepower Diesel coupled to Hamilton Waterjet
Engine Horsepower: 480
Waterjet Nomeclature: Hamilton HJ292 Waterjet integrated package with
Steering/Reverse Mechanism, Jet Mounted Hydraulic Control System, and Dry Run
System.
Location of Jet Nozzle: Aft, just past the transom
Max Shaft RPM: 3300 RPM
Type of Fuel Used: Number 1 Diesel, NUmber 2 Diesel, Jet A, A-1, JP5, JP8
Fuel Tank Capacity: 114 Gallons (twin 57 gallon fuel tanks)
Usable Fuel Tank Capacity: 90% or 100 gallons
