The rapidPro SVT is an evolution of the popular probe series that allows data profiling whilst a vessel is underway. The rapidPro SVT has been developed for the rapid collection of sound velocity profiles, without compromising the quality of the data. Now further developed with a new optimised shape and removable ProLogger module that combines a rechargeable lithium ion battery, data logger, GPS receiver and Bluetooth comms module. The world’s most accurate Sound Velocity sensor with virtually instantaneous response time, data acquisition rates of up to 32Hz housed in a low drag housing result in the highest quality profiles at drop rates up to 5 m/s.