Commercial Traffic Regulations. SECRETARY'S ORDER. NAVY DEPARTMENT, Washington, D. C., July 1, 1915. This handbook is intended as a manual for the information and guidance of all radio officers, electricians (radio), Navy mail clerks, and other authorized persons charged with the handling of commercial radio traffic. The instructions contained herein will supersede all previous orders and will become effective on date of receipt. Radiograms of persons in the naval service may be accepted on board naval vessels without payment for the ship's sending charge, but all other charges in connection with the forwarding of the traffic to destination will be collected from the sender. Such traffic when destined to points on shore will bo forwarded to the nearest shore station open for commercial business, whether naval or commercial station. The methods of operating herein prescribed will be followed without deviation. If any of the expressions contained herein are not understood, an explanation may be obtained from the Director Naval Communications, Washington. In general, the word "ship" is used to refer to a radio station on shipboard, and "station" to refer to a shore station. Occasionally the word "station" is used to denote any radio station, whether ship station or shore station. Its meanng, wherever used. will be obvious from the context. Radio officers and electricians (radio) in charge of all radio stations ship and ashore, are particular]y cautioned that they will be held reponsible for the instruction of their subordinates in these regulations and for their compliance therewith. Such officers and electricians in charge should frequently examine them to insure the proper understanding of these instructions. Date of receipt of this book will be acknowledged to the Director Naval Communications, Washington. Josephus Daniels, Secretary of the Navy.