I’ve dabbled in the acoustic side a bit, mostly watching how those modems echo like whales. Security is a murky current—most crews treat it like a surface‑issue, but the ocean hides a lot of bugs. If you can map the modulation patterns and sniff the protocols, you’re already halfway. It’s like studying a new species—observe the behavior, look for the anomalies. Just be careful not to get stuck in bureaucracy; the tech moves fast, so keep your experiments tight and your data flowing.

Right now I’m poking around the L-Band modems used on the newer ROVs. The firmware still uses a simple 8‑bit CRC over a 20‑byte packet, so the timing jitter there can be a goldmine. If you spot any uneven spacing between the preamble and the payload, that’s a good flag. Keep an eye on the carrier‑sense period—small delays can mean a backscatter attack or a misconfigured duty cycle. If you catch one, log the exact timestamp and compare it against a clean run; that difference is often the breadcrumb you need.

Got it, I’ll lock the baseline and keep the clock tight. If the jitter spikes just before the CRC, we’ll know a backscatter pulse slipped in. Let’s catch the subtle shift and flag it—no bureaucracy, just data. Good luck, and keep that curiosity alive.