Boxfish ROV Navigation: How USBL Positioning Works
Add the navigation package to your Boxfish ROV (remotely operated vehicle) to control and track its position with a USBL (ultrashort baseline) positioning system!
The USBL system consists of two main parts: a USBL transponder and a beacon. The USBL transponder is mounted or suspended from your vessel and communicates with the beacon on the Boxfish ROV wirelessly using high-frequency sound waves.
The USBL transponder periodically transmits commands to the beacon, which the beacon will immediately reply to upon receiving. The USBL transponder can then measure the response time and returning signal direction to calculate the ROV’s 3D position relative to the boat.
The USBL system we use also has an Integrated AHRS (Attitude and Heading Reference System) that helps compensate for errors caused by the boat pitching, rolling and turning.