This is spot on. Most geointelligence is not based on a single photo, but a series of captures (multiple passes, wavelengths, angles, etc) and looking at what h

This is spot on. Most geointelligence is not based on a single photo, but a series of captures (multiple passes, wavelengths, angles, etc) and looking at what has or has not changed. US intelligence agencies already have software that does multi-capture analysis like this, and I suspect it was the original source of this "discovery." Usually it is ran on small areas of the ocean (near military seaports or choke points in waterways) or is done at lower resolution to find big objects (aircraft carriers or cargo ships). The computational workload to find a sub-60 foot object in an entire ocean is mind blowing.