USCG Exam PracticeVessel stability — metacentric height, free surface
Under 46 CFR §28.570(a), what minimum area under the righting arm curve is required between 30° and the lesser of 40° or the angle of downflooding?
- A. 16.9 foot-degrees (0.090 meter-radians)
- B. 10.3 foot-degrees (0.055 meter-radians)
- ✓ 5.6 foot-degrees (0.030 meter-radians)Correct
- D. 15.0 foot-degrees (0.080 meter-radians)
Why C is correct
46 CFR §28.570(a)(6) requires an area of at least 5.6 foot-degrees (0.030 meter-radians) between 30° and the lesser of 40° or the angle of downflooding. The values in options A and B apply to different angular ranges under §28.570(a)(4) and (a)(5) respectively.
Cited:46 CFR §28.570