Deck General · Righting Arm & GZ Curve
The range of positive stability on a GZ curve is:
- AThe angle at which GZ is maximum
- BThe range of heel angles over which GZ is positive (righting moment acts to restore the vessel upright)✓ Correct
- CThe area under the GZ curve from 0 to 30 degrees
- DEqual to GM multiplied by the angle of vanishing stability
Explanation
The range of positive stability is the span of heel angles (from 0 degrees to the angle of vanishing stability) over which the righting arm GZ is positive. Within this range the vessel tends to return upright. Outside this range, GZ is negative and the vessel will capsize.
Authority: Stability & Trim (USCG deck topic)
Practice the full Deck General bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Deck General questions
- Righting Arm & GZ Curve
The righting arm (GZ) is defined as:
- Righting Arm & GZ Curve
On a curve of statical stability, the angle at which GZ first reaches zero after the peak is called the:
- Righting Arm & GZ Curve
The area under the GZ curve between upright and the angle of vanishing stability represents:
- Righting Arm & GZ Curve
Raising G (shifting weight upward) on a vessel's GZ curve will:
- Righting Arm & GZ Curve
At small angles of heel (up to approximately 15 degrees), GZ can be approximated by:
- Stability Definitions
Displacement is best defined as: