USCG Exam PracticeAuxiliary machinery and mechanical systems
Per 46 CFR §58.25-10, the auxiliary steering gear must be capable of moving the rudder from 15° on either side to 15° on the other in not more than 60 seconds. Under what vessel conditions must this performance be demonstrated?
- A. At the deepest loadline draft and running at maximum ahead service speed.
- ✓ At the deepest loadline draft and running at one-half maximum ahead service speed or 7 knots, whichever is greater.Correct
- C. At the lightest loadline draft and running at one-half maximum ahead service speed or 7 knots, whichever is greater.
- D. At the deepest loadline draft and running at one-half maximum ahead service speed or 5 knots, whichever is greater.
Why B is correct
46 CFR §58.25-10(d)(2) specifies the deepest loadline draft and one-half maximum ahead service speed or 7 knots, whichever is greater. Maximum ahead service speed applies to the main steering gear requirement, not the auxiliary, and the speed threshold is 7 knots, not 5.
Cited:46 CFR §58.25-10