You send a DSC test message on your MF/HF radio but don't get an acknowledgement. Did the signal get out at all? Yaddnet can help you. I made a small video to show how it is done. Sorry for the low audio quality.

https://www.youtube.com/watch?v=poYJBWv1Cmc

To see where the receiver stations are I have a list on the Facebook group for Offshore SSB radio and email

https://www.facebook.com/groups/offs...radioandemail/

Yaddnet itself

http://gm4slv.plus.com/