The data logger is specifically designed for LDS. It is a multi-channel 16 bit logger with 2 MB of internal memory. The logger supports a simple measurement schedule.

The data are stored internally for the periods specified before being overwritten and are regularly transmitted to the shore station via telemetry. The user can communicate directly with the data logger while on the lake by connecting to the COMS box on the lake station mast.

The data logger, rechargeable battery, and modem are housed in a waterproof canister which is attached to the station main frame just below the water surface.