What is the difference between an outer marker and a locator outer marker?

The correct answer is that the locator outer marker is essentially a low-powered NDB (Non-Directional Beacon). The locator outer marker serves as a navigational aid associated with instrument approaches, particularly with precision approaches. It provides pilots with a signal to indicate their position in relation to the final approach course.

The locator outer marker is a more limited version compared to the outer marker, which is specifically designed for precision approaches. The locator outer marker's lower power allows it to be used in situations where signal coverage is needed but the requirements for a full outer marker are not necessary.

By understanding the distinctions between these types of markers, pilots can effectively navigate during instrument approaches, ensuring they receive appropriate guidance throughout their descent. The outer marker’s role is crucial for determining the point where the pilot should be established on the final approach course, which is why its characteristics differ from those of a locator outer marker.