Endurance planning: If endurance is 5 hours and you must reserve 0.5 hour, how many hours are available for planning?

• A. 3.0 hours
• B. 4.0 hours
• C. 5.0 hours
• D. 4.5 hours

Answer: (D)

Endurance planning means you subtract the reserve from your total endurance to see how much time you actually have to plan. With 5 hours of endurance and a required 0.5 hour reserve, you subtract: 5 − 0.5 = 4.5 hours (4 hours 30 minutes). This is the time available for planning because the reserve must be kept aside for contingencies. Any value other than 4.5 hours would either ignore the reserve or apply it incorrectly.