According to Noonsite:
Cruisers Net (MedNet), 6516 kHz at 0530 UCT. For the Mediterranean
cruising season (normally commences in April). Open for cruisers from Greece
to Gibralter to give position reports, discuss weather
and to share any other useful information.
Local Aegean informal, 4417 kHz at 0800-0900 local time.
Greek/Turkey informal, 6224 kHz at 0500Z, Channel 6A and on 12353 kHz at 0645Z, Channel 12A.
Here’s your manual: