On the 16th of October 2020, there was a remarkable 3000+ km contact made on the 70cms band between South Africa and St.Helena in the South Atlantic.

The contact at 433 MHz was made between Garry, ZD7GWM on St.Helena Island and Tom, ZS1TA in South Africa. The distance was approximately 3136 km and what was even more amazing was that the contact was made on FM!

To put this remarkable contact on 70cms into context, the 3136 km distance is equivalent to the path across the North Atlantic between Newfoundland and Ireland.

It is believed that the mode of propagation was probably a marine duct.

More info - https://ei7gl.blogspot.com/2020/11/3000km-plus-contact-made-on-433-mhz.html