Supercavitation

Warp Drive Underwater by Steven Ashley : A long time ago, I wrote about Supercavitation here, but apparently missed this article, which covers the subject much more thouroughly. It focuses mostly on the military applications of this technology (though it is applicable to ocean farming and underwater exploration) and it contains a lot of detail on the most famous example of the technology, Russia's VA-111 Shkval (Squall) rocket-torpedo. Some of the details are speculative, but they give a good explaination of the technology as well as some of the main applications, which include high-speed torpedoes, underwater machine-guns armed with supercavitating bullets to help clear mines, among other applications. Underwater mines are a serious nuisance, and an application such as the US RAMICS program would be a huge help... [via Punchstack]