In communications, transmission is the act of transmitting electrical messages (and the associated phenonomena of radiant energy that pass through media).
In telecommunication, the term transmission has the following meanings:
1. The dispatching, for reception elsewhere, of a signal, message, or other form of information.
Communications between a coast station and a ship station, or between two ship stations, must be exchanged on both sides by means of the same wavelength.
The time occupied in radiotelegraphic transmission, and also the time during which the radiotelegram remains at the coast station in the case of radiotelegrams addressed to ships, or in the ship station in the case of radiotelegrams originating in ships, shall not be counted in the period of delay giving rise to refunds and reimbursements.
Transmissions exchanged between ship stations must be carried out in such a way as not to interfere with the service of coast stations, as the latter must have, as a general rule, right of priority for public correspondence.