It was a poster child for NDB
shoreline effect, where the signal bends to follow the boundary between earth and sea.
Selected quartzite boulders were salvaged, cleaned, and placed back within the system's concrete fill, in specific locations, creating an attractive rock
shoreline effect.
Add into the mix for this approach an absence of horizon over the water, a possible language barrier, ICAO procedures, high inland terrain, NDB
shoreline effect, and a pilot rusty on bearings and this could grow into a real nail-biter.