Which statement correctly describes 90 degrees in the guideline?

• A. Watch greater than 4 hours
• B. Watch equal to 2 hours
• C. Watch less than 1 hour
• D. No watch required

Answer: (A)

This question tests how the guideline translates a 90-degree reading into a watch-time action. In this guideline, angular indicators are used as thresholds that tell you how long a crew member should be on watch to manage risk. A 90-degree reading is a strong, high-severity cue, so the instruction is to keep watch for more than four hours. That is why describing 90 degrees as requiring a watch greater than four hours is the most consistent interpretation of the guideline. The other time options (two hours, less than one hour) don’t align with the severity implied by a 90-degree angle, and no watch would ignore a detectable cue.