Data is transmitted to the surface via a conducting cable. An above water radiometer provides a control for changing surface light conditions. The package is housed in a cylindrical stainless steel cage and is lowered on a hydrowire with at least two conducting cables. The cage height is approximately 1 meter, with a diameter of approximately 0.7 meters. Typical lowering speed is 0.4 meters per second and the package samples at 3 hertz.
Information regarding calibration is available.