Chaz W4GKF and a nine other (mostly) SEDXC members journeyed to Navassa Island in May, 1972. Dave K4SSU was part of a group that visited Navassa in 1978. Yes, that's a looooong time ago, but with renewed hope that permission to land on Navassa will soon be forthcoming, these presentations take on a more timely feel.
Here are QSLs from those operations: