An electric driven steering gear power unit...

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Question 1 of 205eccef9cbacbc34ba4d45a72

An electric driven steering gear power unit is required by Coast Guard Regulations (46 CFR) to be capable of putting the rudder over from 15° on one side to 15° on the other side in not more than 60 seconds under emergency power with the vessel running ahead. For a 20 knot vessel, this test must be carried out at __________.

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🔍 Key Concepts

• 46 CFR requirements for steering gear performance under emergency power • Relationship between test speed and full sea speed when checking steering gear operation • Understanding why the Coast Guard specifies the vessel must be "running ahead" at a certain speed for this test

💭 Think About

• How does vessel speed affect the load on the rudder and steering gear when moving from 15° one side to 15° the other? • Would the Coast Guard want this emergency steering test done at a speed that is easier, harder, or representative of actual operating conditions for the steering gear? • Is the specified test speed likely to be a fraction of full speed, service speed, or full sea speed for this type of safety test?

✅ Before You Answer

• Verify what 46 CFR says about steering gear trials under emergency power and the required vessel speed for the test • Check whether the regulation ties the test condition to maximum ahead service speed or allows a reduced test speed • Confirm that the required time (not more than 60 seconds) is measured while the vessel is actually making way through the water at the specified speed

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