I would zap #[2] over and over. 1 for 0 and 2 for 1. I'd write in this way a binary message that describes my position. Without a sextant, I'd have to try my best to eyeball approximate degrees and star positions, but tracing the lightning network path might be enough to locate me.

Also, how do I have access to zaps and not nostr XD Why can I zap, but not write a message on the internet?