THE HONG KONG GOVERNMENT GAZETTE, JANUARY 31,
3. The following paragraphs shall be substituted for paragraphs 17A, 17B, 17C and 17D of Schedule IV to the principal Order:
'17A.-(a) Where an aircraft has a message to send stating that it is in difficulties and about to land compulsorily but does not require immediate assistance, it shall preface the call with several repetitions of the urgency signal PAN.
(b) Where the signal PAN is received from an aircraft without any message following, it shall signify that the aircraft has been com- pelled to land and is unable to transmit its intended message owing to the rapidity of the landing, but does not require immediate assistance.
(c) Where the signal PAN is sent by radio-telegraphy the three letters shall be well separated so that the signals AN are not trans- formed into one signal P.
(d) Where the signal PAN is sent by radio-telephony it should be pronounced like the French word panne '.
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17B. Where an aircraft has a very urgent message to send con- cerning the safety of the aircraft, or of any person on board, or of any ship or aircraft or person within range of assistance, the urgency of the message shall be indicated by an urgency signal as follows:-
(a) In visual signalling, by prefacing the call with a succession of green pyrotechnical lights or a succession of green flashes made with daylight signalling apparatus.
(b) In radio-telegraphy, by prefacing the call with several repetitions of the group XXX, the letters of each group and the successive groups being clearly separated from each other.
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17C. None of the urgency signals referred to in the two last preceding paragraphs may be transmitted except with the authority of the Commander or person responsible for the aircraft.
"17D. Where an aircraft has a message to send concerning the safety of navigation or containing important information relative to meteorological warning messages, it shall first transmit the safety signal as follows:
(a) In radio-telegraphy, the safety signal consists of three re- petitions of the group TTT, with the letters of each group and the successive groups well separated. This signal shall be followed by the word DE and by the call sign of the aircraft three times repeated.
(b) In radio-telephony, the safety signal consists of the French word SECURITE (corresponding to the English pronounciation of the syllables SAY-CURE-E-TAY), repeated three times. This signal shall be followed by the call sign of the aircraft three times repeated."
4. The following paragraph shall be inserted after paragraph 33:-
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34. To facilitate compliance with the foregoing rules of this section, the pilot of a flying machine shall, save in exceptional circum- stances, be placed either in the plane of symmetry of the flying machine or on the left hand side of the plane of symmetry.
5. The following paragraph shall be substituted for paragraph 36:-
* 36. If a flying machine or glider starting from, or about to land at, an aerodrome makes a circuit or partial circuit, the turning--
(a) in the case of a land aerodrome, must be made clear of the landing area and must be left-handed (anti-clockwise) so that during the circuit the landing area shall always be on its left; and,
(b) in the case of a water aerodrome, must be left-handed (anti- clockwise)."
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6. In paragraphs 37 and 38, after the words 6,000 feet there shall be inserted the words in the case of a land aerodrome, or 2,000 feet in the case of a water aerodrome."
7. The following paragraph shall be substituted for paragraph 40:-
40.-(1) By day at every aerodrome the direction of the wind at the landing area shall be clearly indicated by a landing T, wind sleeve, smoke producing wind indicator or other recognised method.
(2) Where a landing T is used, it shall be placed so that the shaft of the T lies along the direction of the wind and the cross arm lies across the windward end of the shaft.
1936.
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