If you want to follow up on this some more, there's a reflector on groups.io devoted to NAVTEX DXing - no doubt some of them are using YAND and may potentially be helpful
This group is for those interested in Navtex Dxing. We monitor long distance transmissions on both the MF and HF Bands. NAVTEX transmissions are navigational and meteorological warnings and forecasts, as well as urgent marine safety information to ships, and made at either regular scheduled...
groups.io
Mike
I`m surprised that some of the other HF frequencies for Navtex aren`t mentioned on that site. I decode the bulletins on 8416.5 kHz every evening, and have occasionally received them on 6314, 12579 and 16806.5, depending on the time of day and the conditions, of course. 8416.5 is the most reliable frequency at my location, usually from Pt. Reyes, Calif., but I`ve also picked up Navtex from Iqaluit in Canada`s far north, albeit rather weakly.
As for the LW frequencies, they`re totally unusable here due to severe RFI.