airspyserver

I made an spyserver but i have a problem that the minimal frequency is 24 mhz even if the rtl sdr v4 can go lower without direct sampling i think the problem is that it doesnt allow to go lower because rtl sdr v3 cant go lower without direct sampling

UK here. Does anyone have a confirmed list of Marine frequencies they could share, for direct call up’s to Dover CoastGuard. I have 156.000, Ch. 11 & 16, I’m more interested in the boat to boat, air to ground comms for the rescue of migrants in the channel. Thank you.