 Complete the following phrase:  By 1936, the importance of linking the stations with the Main Intercept Station by the teletype was known. Initially the general Navy teletype net was used to link coastal stations and Berlin, but gradually a specialized Radio Intelligence teletype net was created to link all the stations. The time it took for a signal to be gathered, decoded and analysed was reduced to thirty minutes. During the 1920s, the same signal were sent to Berlin by post. The increase in speed led to the redesign of the staff facilities at B-Dienst, so that the operations department plotting room were directly connected to the updating of charts After 