A group of archaeologists discovered an intact Byzantine shipwreck at the bottom of the Dead Sea. The composition of the water in the Dead sea preserved the ship as well as the jars found around it. The archaeologists found the shipwreck long before they could excavate it as they needed new technology to allow them to recover artefacts from the bottom of the sea. This is where the ROVs (Remote Operated Vehicles) were useful . Check it out here.
ROVs used in Black Sea Expedition