The Hardened Underwater Modular Robot Snake (HUMRS) was made waterproof with adapted water-resistant modules that had been used to make the snakebot resistant to non-ideal conditions in the past. The team then added turbines and thrusters to propel the bot through the water, and presto!, they had a fully submersible swimming robot.
The team envisions the HUMRS being a useful tool for inspecting ships that are out of port, as well as pipes and other submerged infrastructure that is difficult for larger underwater robots to get to.