What is the expected arrival time at point Y if point X is crossed at 1015 local, with a distance of 32 NM, true course of 100 degrees, and wind of 240 degrees at 25 kts?

To determine the expected arrival time at point Y after crossing point X at 1015 local, we first need to calculate the groundspeed, taking the wind into consideration, and then find out how long it will take to travel the distance to point Y.

In this scenario, the aircraft is traveling on a true course of 100 degrees, while the wind is coming from 240 degrees at 25 knots. The angle between the course and the wind direction is important for determining the impact of the wind on groundspeed.

When the wind is at 240 degrees and the aircraft is heading at 100 degrees, you would essentially be looking at a scenario where the wind is from the left rear quadrant of the airplane’s flight path. Wind from the left generally reduces groundspeed if the wind is pushing against the intended course.

To calculate groundspeed accurately, you’d typically use the wind triangle or vector analysis, which requires a more detailed set of calculations. However, for a simplified approach:

1. Assume that the wind effects slow the aircraft slightly and we estimate a groundspeed of about 120 knots after considering the wind (the typical calibration subtracts around 10-15 knots depending on flight conditions).

2. Now, we convert the distance