This 25-page technical report, from Washington University, describes the remotely operated vehicle (ROV) the Underwater Remotely Operated Vehicle team created for the MATE ROV 2021 Competition. This competition is a global underwater robotics competition for STEM students. The competition includes Explorer, Ranger, Navigator, and Scout classes. The teams participating in the competition were tasked with "design[ing] and build[ing] a remotely operated vehicle and the necessary sensors and tooling to tackle the real- world problems of plastics in our ocean, climate changes impact on coral reefs, and the consequences of poor environmental practices on our inland waterways." This technical documentat...