S.L. 399.34 Art. 3Classification of ships. Nature of installation.

For the purposes of these Rules, ships shall be classified as follows:

Class I - Ships carrying 200 persons or more; Class II - Ships carrying 50 but less than 200 persons; Class III - Ships carrying less than 50 persons.

In reckoning the number of persons carried by a ship there shall be included the normal crew of the ship and the maximum number of passengers permitted to be carried by the passenger certificate of the ship.

The radiocommunications installation with which a ship 4. shall be provided (hereinafter referred to as "the installation") shall be of a type approved by the Inspector of Radiocommunications to the Government and shall in particular comply with the following conditions:

(i) The installation shall be of the spark or interrupted continuous wave type and shall be capable of transmission and reception on the 600 metre wave.

(ii) The installation shall include a normal installation and an emergency installation, except that where the normal installation complies with the requirements of this Rule as to emergency installations as well as those as to normal installations, a normal installation alone shall suffice.

(iii) A normal installation must be capable of transmitting clearly perceptible signals from ship to ship over a range of at least 100 nautical miles by day, under normal conditions and circumstances.

(iv) An emergency installation must include an independent source of energy capable of being put into operation rapidly, and of working for at least six continuous hours with a minimum range from ship to ship of 80 nautical miles for ships of Class I, and 50 nautical miles for ships of Classes II and III, and such independent source of energy must be capable of being worked for at least six continuous hours independently of the source of the propelling power for the ship, the steam supply system and the main electricity supply system.

(v) For the purposes of this Rule an installation shall be deemed to comply with the above requirements as to range, if it is able to maintain communication on a 600-metre wave, at a range of one and a half times the number of nautical miles hereinbefore respectively prescribed over sea by day, with any shore radiocommunications station licensed by the competent authority of the place where it exists, when employing a receiver without amplification devices. Alternatively the installation must operate with sufficient power to give under normal working conditions 60 metre amperes in the case of a main installation, 45 metre amperes in the case of an emergency installation on a 1st Class ship and 26 metre amperes in the case of an emergency installation on a 2nd Class ship. The number of metre amperes is obtained by multiplying the maximum current (R.M.S.) intensity in amperes in the aerial by the maximum height in metres of the highest point of the aerial above the deepest load water line.