When entering a holding pattern cleared to hold south on the 180 radial, what entry procedure should be used?

When entering a holding pattern while cleared to hold south on the 180 radial, the correct procedure is the teardrop entry. This method is most commonly used when the aircraft approaches the holding fix from an angle that is more than 90 degrees off the holding course. Specifically, if you are on a radial that is less than 90 degrees from the outbound heading, the teardrop entry allows for a smooth transition into the hold.

In this scenario, since you’re holding south, your outbound course would be 360 degrees. If you are coming from an angle that allows you to intercept this course at a wider angle, the teardrop path helps manage a comfortable approach back towards the radial. This entry method is efficient and helps to minimize time spent in the holding pattern while enabling the pilot to set up for a consistent approach back to the fix.

Other entry methods could be less appropriate depending on the specific direction of approach and angles to be navigated, which is why teardrop is designated as the fitting choice in this context.