Underwater remote-operated vehicles, or ROVs, are almost impossibly fascinating. They’re controlled by a surface-based operator, who watches their real-time video feed and pilots them via a long umbilical cable. Although the big-league multi-million-dollar ROVs are used for things such as exploring the wreck of the Titanic
or studying hydrothermal vents, hobbyists have quite a bit of fun using their own home-built versions
just to see what’s under the surface of the local lake. Unfortunately, even to build one yourself, you need to be pretty technically skilled. That could change, however, as the OpenROV project is developing “easy to assemble” kits – it may even provide li’l ROVs that are ready to go, right out of the box.