You do realize they were/are using the technology you have referenced multiple times? It is evident that there is more than just a proficient level of the use and understanding Cesium Magnetometry. Regardless of industry, CM operation is a practical and learned skill, it is agnostic to any vertical.
It made me understand that maybe they need something that the market does not offer. They even noted that water and sea bed conditions are quite different than all the known wreck south of Melbourne.
Word to the wise, I would be careful criticizing “ Tinkerbell II.”
For me, I am on the sidelines, using common sense and maturity to allow this thing to pan out.
SFRX is serious people doing serious work. Tinkerbell is included.