The artifacts came from undersea dives and excavations from the area, which has been inhabited for at least 3,000 years.
Think advanced unmanned vehicles, all-aspect, broadband stealth, and undersea warfare.
The best of the German undersea boats, it has been estimated, could not remain under more than three hours at high speed.
The undersea reaches lay ahead of him, and the way was clear.
Immediately the men in the submarine went to work, and George felt the undersea craft fairly flying through the water.
undersea, submarine; underspan, subtend; underslinking, subterfuge.
If we approached an undersea cliff I must raise us at once to prevent us being smashed against it.
Fields of undersea, the lines faint brown in grass, buried cities.
When a mass of bubbles from undersea could provoke such a turmoil in the water that no ship could stay afloat?
This machine will nicely furnish you the power for your undersea liner.