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USCG Exam PracticeTwin-screw vessel handling

Which of the following propulsion systems produces NO propeller side force?

  1. A. Twin inboard engines with conventional shafts
  2. B. A single inboard engine with a V-drive
  3. C. Twin outboard motors on a bracket
  4. ✓ A waterjet driveCorrect

Why D is correct

A waterjet has no propeller side force because its impeller runs fully enclosed in the pump housing, eliminating the blade-arc asymmetry that produces side force on a conventional propeller. (USCG Boat Crew Seamanship Manual §10-A)

Cited:USCG Boat Crew Seamanship Manual §10-A

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Which of the following propulsion systems produces NO propeller sid… — USCG Exam Practice · CaptainsGround