Sealantern Electronics Co., Ltd has built strategic cooperation relation with Radio Holland China Ltd in the sailing communication field. Hereby Radio Holland China Ltd became Sealantern¡®s authorized agent and supplier of distribution business and services for Sealantern-developed VDR (Voyage Data Recorder) & S-VDR (Simplified Voyage Data Recorder) systems. The two parts signed the formal cooperation contract on 13 December 2006.