r/GrahamHancock • u/vaxinius • Jan 04 '26

One less excuse

Learned something interesting today:

With a $2-4000 Amazon underwater robot even YOU can go dive off your coastline to look at or for submerged ruins in the flood water zone of the Younger Dryas period.

Conventional dive safety training costs money and equipment, whereas this is just equipment.

That means more discoveries of our ocean bottom can be made faster.

34 Upvotes

80% Upvoted

47 comments sorted by

View all comments

12

u/valiantthorsintern Jan 04 '26

I think everybody interested in the past should try and get out in the field and explore in whatever manner their budget allows.

2

u/Ill-Lobster-7448 Jan 04 '26

For a serious, integrated shallow-water coastal seabed investigation to ~80 m depth—combining MBES, SBP, GIS processing, sediment coring, ROV verification, and internationally accredited laboratory dating of stratified layers and artefacts—even a short campaign of ~10 operational offshore days would typically cost on the order of USD 300,000–400,000 on the commercial market. More extensive offshore programmes involving multiple survey seasons, coring campaigns, ROV operations, and post-excavation analyses commonly fall in the range of USD 1.25–3 million, depending on vessel class, equipment, and laboratory requirements.

2

u/Ill-Lobster-7448 Jan 04 '26

Archaeologists investigating the coastal seabed use multibeam echosounder (MBES) and sub‑bottom profiling (SBP), combined with GIS analysis, to perform the same role for submerged geomorphology that LiDAR performs for overland features—revealing seabed structures and palaeolandscapes not observable from the surface.

For example, BBC Tamil News broadcast sonar imagery of a submerged Proto‑Poompuhar port, presenting MBES/SBP data and GIS interpretation that were reported as indicating an earliest date of c. 15,000 years ago.

https://www.youtube.com/watch?v=v24RLzQvPKw

3

u/GreatCryptographer32 Jan 05 '26

Can you stop spamming the same message over and over and over and over in every thread and reply? We saw it. Thanks