Have a Read of the Impressive Capabilities of the Reach and Rescue Sonar Search Frame
This accessory is used for searching underwater for bodies and objects using a Sonar that you can attach to the universal frame. The system is essential for keeping people out of hazardous zones whilst still getting the information you require through the use of the Sonar.
One of the norms of underwater searching is to use remotely operated underwater vehicles (ROV) which are hard to use for searching the hull of boats for bodies/objects compared to using the Sonar technique.
Using the Sonar Search Frame also reduces the cost in search operations massively compared to the norm.
View the product page and take a more detailed look into the Sonar Search Frame HERE