Artikel 144

(1) When a VHF radiotelephone station is provided it shall be a permanent installation situated in the upper part of the vessel and include a VHF radiotelephone installation complying with the provisions of this Regulation and comprising a transmitter and receiver, a source of power capable of actuating them at their rated power levels, and an antenna suitable for efficiently radiating and receiving signals at the operating frequencies.
(2) Such a VHF installation shall conform to the requirements laid down in the Radio Regulations for equipment used in the Maritime Mobile VHF International Radiotelephone Service and shall be capable of operation on those channels specified by the Radio Regulations and as may be required by the Administration concerned.
(3) The transmitter radio frequency carrier power output shall be at least 10 watts with a reduction capability to 1 watt. The antenna shall, as far as is practicable, have an unobstructed view in all directions.
(4) Control of the VHF channels required for navigational safety shall be immediately available in the wheelhouse convenient to the conning position and, where necessary, facilities shall also be available to permit radiocommunications from the wings of the wheelhouse.
(5) Where a VHF radiotelephone station is fitted as the main installation under the provisions of Regulation 131(2)(b), a reserve source of energy shall be provided complying with Regulation 143(9), (10), (11) and (12) with sufficient capacity to operate the transmitter and receiver for at least 6 hours continuously.