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THE HONG KONG GOVERNMENT GAZETTE, JANUARY 8, 1932.
(b) Where the signal PAN is received from an aircraft without any message following, it shall signify that the aircraft has been compelled to land and is unable to transmit its intended message owing to the rapidity of the landing, but does not require immediate assistance.
(e) Where the signal PAN is sent by radio-telegraphy the three letters shall be well separated so that the signals AN are not transformed into one signal P.
“178. - Where an aircraft has a very urgent message to send concerning the safety of the aircraft, or of any person on board, or of any ship, aircraft, vehicle or person within sight, it shall, for the purpose of indicating the urgency of the message, preface its call sign with several repetitions of the group XXX the letters of each group being clearly separated from the letters of the successive group.
17c.
Neither the PAN nor the signal XXX may be transmitted except with
the authority of the commander or person responsible for the aircraft. 17.-Where an aircraft has a message to send concerning the safety of navigation or containing important information relative to meteorological warning messages, it shall preface its call sign by the safety signal, consisting of the group TTT (transmitted with the letters well separated) followed by the word DE."
11. lu paragraph 39 of Schedule IV to the Principal Order the word "these " shall be omitted.
12. The last sentence of paragraph 48A of Schedule IV to the Principal Order shall be omitted and the following substituted therefor :-
"Where any such directions are for the time being in force with respect to any aerodrome, there shall be placed horizontally in that aerodrome, near to the signal which indicates the direction of the wind, a red square panel, every side of which shall measure at least ten feet in length and shall be marked at night by red lights."
13. The following amendments shall be made in Schedule V to the Principal Order:-
(a) In sub-paragraph (1) of paragraph 2 after the word "authority" there shall be inserted the words "in any part of His Majesty's dominions out- side Great Britain and Northern Ireland or ";
(6) Paragraph 3 shall be omitted.
14. The following paragraph shall be inserted at the end of the Schedule VI to the Principal Order
"7 (1) Where it is brought to the notice of the Governor-
(a) that a large number of persons is likely to gather in any district in the Colony for the purpose of witnessing some event of public interest; or
(b) that it is intended to hold in any district in the Colony an aircraft.
race or contest or exhibition of flying;
the Governor may by directions impose such temporary restrictions of the flying of aircraft within or in the neighbourhood of that district as he may consider expedient in the interest of public safety, and no aircraft shall fly in contraven- tion of any such directions:
Provided that any such restrictions, in so far as they relate to aircraft other than State aircraft, shall apply to British aircraft and aircraft registered in any other Contracting State without distinction.
(2) Any directions issued under this paragraph shall specify the area or areas to which the restrictions extend and the time or times during which the restrictions are to be in force, and, in the case of restrictions applying