Scale H
Radio navigation equipment capable of enabling the aircraft to be navigated on the intended route including:
(a)automatic direction finding equipment;
(b)distance measuring equipment;
(c)duplicated VHF omni-range equpment; and
(d)a 75 MHz marker beacon receiver.
Except that:
an aircraft may fly notwithstanding that it does not carry the equipment specified in this Scale if it carries alternative radio navigation equipment or navigational equipment approved by the Authority in writing in accordance with the provisions of article 14(7) of this Order;
where not more than one item of equipment specified in this Scale is unserviceable when the aircraft is about to begin a flight, the aircraft may nevertheless take off on that flight if:
(i)it is not reasonably practicable for the repair or replacement of that item to be carried out before the beginning of the flight:
(ii)the aircraft has not made more than one flight since the item was last serviceable; and
(iii)the commander of the aircraft has satisfied himself that, taking into account the latest information available as to the route and aerodrome to be used (including any planned diversion) and the weather conditions likely to be encountered, the flight can be made safely and in accordance with any relevant requirements of the appropriate air traffic control unit.