To calculate times in navigation, the Groundspeed (GS) is required, which is equal to:

• GS = TAS + Tailwind component, or
• GS = TAS - Headwind component

For this question, GS = TAS - Headwind component = 130 kt - 15 kt = 115 kt.

The ground distance covered is 210 NM. Thus, the flight time required is: Ground Distance / GS = 210 NM / 115 kt = 1.82 hr or 01:50 approximately.

Thus, the Estimated Time of Arrival (ETA) is: ETD + Flight time = 09:15 UTC + 01:50 = 11:05 UTC.

NOTE:

To convert the time from HH:MM to a decimal form, proceed as:

• 1.82 hr = 01 hour and 0.82x60 min = 01 hour and 49.2 min.