USCG Exam Practice · Single-screw maneuvering and prop walk
Under 46 CFR §184.620, a propulsion engine control system including pilothouse control must be designed so that a loss of power to the control system results in which of the following?
- AAn automatic reduction of shaft speed to idle
- BNo increase in shaft speed or propeller pitch✓ correct
- CImmediate engine shutdown to prevent runaway
- DTransfer of control to the secondary steering station
Why B is correct
46 CFR §184.620(c) states that a propulsion engine control system must be designed so that a loss of power to the control system does not result in an increase in shaft speed or propeller pitch. The regulation does not require automatic shutdown or speed reduction to idle; it only prohibits an increase.
Cited:46 CFR §184.620
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