Underwater equipment refers to tools and devices designed for use beneath the surface of water. This includes items like scuba gear, which allows divers to breathe underwater, and submersibles, which are small underwater vehicles used for exploration. Other equipment includes underwater cameras for capturing images and videos, as well as sonar systems for detecting objects underwater. Additionally, underwater equipment can encompass buoys for marking locations, fishing gear for catching fish, and dive computers that help divers monitor their depth and time underwater. These tools are essential for various activities, including scientific research, recreational diving, and marine exploration.