Wow thanks, there's not really any dm functionality on hn and I didn't see a clear social handle in your profile. https://github.com/montanaflynn/ has my email.
You could get in touch with GP by googling for his company (see profile), finding his name through the company website (he's the CEO), and then googling for his LinkedIn/X accounts.
Also: Cool project!
Aren't ships turning off their AIS when traveling the straight? I think https://atlas.flexport.com/ could also be a good source.