Refer to figures.
First Step: using the flight computer, find the Groundspeed for the track PESAR – STD and STD - RIVER.

1. Set wind direction to 310º under the "TRUE HEADING" index at the top.
2. Set the center point on the True Airspeed (TAS) of 260 kt.
3. Mark the wind velocity 20 kt down from the centre point.
4. Initially, set the True Track under the "TRUE HEADING" index.

• PESAR to STAD: 306°

5. The groundspeed for this track is approximately 240 kt.

• STAD to RIVER: 338°

5. Note that this heading would result in 2ºR drift and a track of 340º.
6. Reduce the heading value under the index until the heading plus the drift gives a track of 338º. This occurs at a heading of 336º with 2ºR drift.
7. The groundspeed for this track is approximately 242 kt.

Second Step: Find time left until diversion
At PESAR we have 5000 kg and we will divert at 3600 kg.
5000 kg – 3600 kg = 1400 kg
1400 kg / 2400 kg/h = 35 minutes

Third Step: Find time leg PESAR – RIVER

• PESAR to STAD: 13 NM / 240 kt = 3.25 min
• STD to RIVER: 11 NM / 242 kt = 2.73 min

2.73 + 3.25 = 5.98
approx. 6

Forth Step: Subtract time leg PESAR – RIVER from time available until 3600kg is reached – that will be the time available to holding.
35 – 6 = 29 minutes