Some how that makes it even worse.
Someone is doing something legal and that doesn't impact you in any way at all, why even care? IMHO, you should be better than that.
Well I mean _someone_ has to run the startup we all want to do.
> <title>Fuck 'em</title>
> <a href="mailto:[email protected]">hit us up.</a>
What if people pay for that exactly because it's risky and potentially fatal?
One thing the military does/did to communicate with subs is use low-bandwidth text-only very low frequency radio, but you need colossal transmitters and there's no way the mother ship carries one. Hydrophones are also an option, and IIRC NATO even has a working sound-based modem to transmit digital signals to subs, but not sure if that has spread in the civilian market.
Or fire a torpedo and detonate it.
Probably much lower range vertically.
e.g. every 2 hours, send up a transmitter that sends an "A-OK" on X Khz for at least Y minutes. If you get a bunch at once, or don't get any for a while, or get the "Something wrong" on Y Khz transmitter, you know something's gone awry.
Source: https://twitter.com/Pogue/status/1670835763536183297