Unknow at maritime band

[braluca]

If I set USB mode I can hear at 6366, 6371 and 6377 KHz signals sounding RTTY with 850 Hz shift but I am not able to decode using Multipsk (LSB mode)
Anyone know what they are?

 

[ka3jjz]

It would be much more helpful to know the time (in UTC preferably) you heard these. An 850 shift sounding like RTTY might be STANAG, which is uncopyable unless you get them sending a test tape which is always sent in the clear. But this is a WAG at best

Mike