Submarine drones study the shipwrecks of the Black Sea
>More than 40 shipwrecks dating across a millennium were identified. The earliest is from the 800s, during the Byzantine Empire, and the rest largely date from when the sea was under Ottoman rule, from the 14th to the 19th centuries.
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>Thanks to its deep, oxygen-starved waters, the Black Sea has preserved huge numbers of wrecks, and now […] people on the surface can see them up close.
This is an old article, actually. The Black Sea MAP project was completed over 5 years ago. But it has found very exciting shipwrecks.
https://www.theguardian.com/science/2018/oct/23/oldest-intact-shipwreck-thought-to-be-ancient-greek-discovered-at-bottom-of-black-sea