In the ham world (and the SWL world), Navassa Island was in the top 3 of
rare locations. They have not been on for decades but recently received
permission from the govt agency that controls the island to run a
DXpedition. They are on the air as we speak -- and won't be given
permission to do it again for ten years.

Presumably they will honor SWL QSL requests.

To see what bands and modes they are currently on, go to the DX spotting
site DXSummit.fi

To read about the island and the DXpedition and QSL info, go to
navassadx.com

It's a real mob scene, but I got lucky and worked them on 20 CW with 100
watts and a low dipole...