Oceaneering International's products are designed to operate in places where most people don't venture, from the bottom of the sea to the reaches of space. The company provides offshore oil companies with underwater drilling support, construction, inspection, and repair services. Oceaneering also makes subsea systems to test potential offshore oil fields. The company's advanced technologies unit makes remotely operated diving vessels (ROVs), which are often used in search and recovery operations for the US Navy, life-support robotic systems for use in space, and robotics for use in the entertainment industry. In 2015 the company owned 315 ROVs, the largest fleet in the world.