https://remove-js.com/https://www.popularmechanics.com/military/a60526262/underwater-ufo-threat-navy-officer/
We may need an international, worldwide sensor network in order to collect and filter endless amounts of data, while looking for the anomalous. This would include submerged sensors, surface sensors, and space, in as many frequencies as is feasible across the em spectrum.
It's a daunting project. But even if there were not any anomalies, such a giant sensor array can probably be justified for general purpose research.
I don't know how forthcoming any branch of the military can ever be. They have institutional reasons to be cautious and cagey with any info that is thought to lead to a military advantage.
That's why we get a slow drip of information like, "yes, something we don't understand does exist..." and that's it. If we want more than that, we probably need a collaborative privately owned sensor network, or a major white house lawn landing, or a major NHI action like abducting half of the NYC, something absolutely undeniable and absolutely unignorable.
The way things are now imo will also lead to some disclosure, eventually.
I've seen some amateur projects popping up for camera and visual sensors that either sell the gear or schematics to make your own sensors. However, I haven't seen any programs so far that seem expansive or organized enough yet. And, they're currently only monitoring the sky and not objects in the water. The systems I've seen are also expensive or daunting for an average person to set up. I think one is bound to catch on and hopefully help establish public data on the phenomenon.
The odd thing is that the DoD, alongside AARO's report downplaying UAP, had announced plans for a portable sensor system for UAP. The Gremlin sensors are intended to be able to provide broad coverage of the US and potentially the world. Japan has already considered using these or similar to monitor their airspace. The problem again is that the data is controlled by the DoD or individual governments setting these up.