Hollyhock 1974
When approaching the Straits of Florida a ghostlike landmass on about 18 kilometres distance appeared on the radar of the Hollyhock.

Hollyhock
The mass was to big to be a ship; it was moving with the same speed as the Hollyhock and because of this it was never seen with the eye. It looked like a smaller version of Andros Island, which was just left by the Hollyhock. When the ship approached Florida, the strange mass dissolved in the coastline. Several other smaller vessels apparently did follow the strange mass too at the same moment.