What heading should be followed when flying direct to PT Shamrock after reaching 1,000' MSL from the west?

When flying direct to PT Shamrock after reaching 1,000' MSL from the west, the appropriate heading to maintain is approximately 140°. This direction aligns well with the standard navigational practices for determining headings in relation to a waypoint.

In aviation, headings are typically given in degrees relative to true north. When approaching from the west toward a specific point, you must consider the magnetic declination and the geographical orientation of the waypoint. A heading of around 140° ensures that the flight path effectively directs the aircraft toward PT Shamrock, compensating for any wind factors and allowing for a smooth approach.

In contrast, the other options would not provide a suitable route to PT Shamrock from that altitude and direction. Thus, the choice of approximately 140° is not only strategically correct for efficient navigation but also adheres to the principles of flight management near waypoints.