Foreword

(a) This Civil Aviation Regulation (CAR) has been issued by the Public Authority for Civil Aviation of Oman (hereinafter referred to as PACA or “the AUTHORITY”) under the provisions of the Civil Aviation Law of the Sultanate of Oman.

(b) This CAR has been modelled upon similar regulations implemented by other member States and includes the subject matter endorsed within ICAO Annex 5, Units of Measurement to be Used in Air and Ground Operations. This CAR contains specifications for the use of a standardized system of units of measurement in international civil aviation air and ground operations. This standardized system of units of measurement is based on the International System of Units (SI) and certain non-SI units considered necessary to meet the specialized requirements of international civil aviation.

(c) CAR 178 prescribes the requirements:

• (1) for all civil aircraft operating in the Muscat Flight Information Region (FIR), and all aircraft bearing the nationality and registration marks of the Sultanate of Oman, wherever they may be, to the extent that they do not conflict with the rules published by the State having jurisdiction over the territory over-flown.