I asked you what vehicle you were looking at, did
Post# of 7795
The AUV was purchased a couple years ago, but GMAR had it for several years before that. They scanned over 2000 sq miles.
Likewise, Endurance scanned nearly as much in the early days. Both found wrecks, and a lot of them. The images could not be any clearer. Some wrecks may be merchant ships that may contain building materials and others may be passenger ships that carried mostly the wealthy.
SFRX is working 2-3 square mile areas and have for several years. let that sink in.
But back to your question. Non ferrous sensors would be 3rd party. This is what Bluefin offers.
The Bluefin-12 base model comes with an open and flexible payload bay, providing more than 4,000 cm3 of payload volume to allow rapid integration of mission specific payloads. This UUV can also be configured as a turnkey system delivering integrated survey capabilities including high-resolution sonar, environmental sensing, powerful on-board data processing and highly accurate navigation.
The non ferrous sensor would be 3rd party, much like what was back ordered by SFRX
Notice the room near the front of the vehicle for sensors.
https://gdmissionsystems.com/-/media/General-...A7F12990D3