With the help of so-called 2D real-time sonar, you get a quick overview of the surroundings used for navigation and obstacle avoidance. The sonar works at high frequency and provides a detailed picture regardless of visibility and has a range up to 100m. The image is updated in real time and the sonar can be used for safe observation during works where objects are lowered to the bottom such as sacks or filling work. The sonar is also an excellent tool for search and salvage operations and has sufficient resolution to detect bodies. Georeferenced video means that using underwater positioning equipment (USBL) every videoframe can be assigned a position. During inspections, it is critical to know exactly where observations are made.