{"id":8803,"date":"2024-07-22T22:43:19","date_gmt":"2024-07-22T14:43:19","guid":{"rendered":"https:\/\/tommykwan.com\/blog\/?p=8803"},"modified":"2024-07-22T22:58:02","modified_gmt":"2024-07-22T14:58:02","slug":"vhhh-%e9%a6%99%e6%b8%af-%e6%97%a2-transition-altitude-%e5%90%8c-transition-level-%e4%bf%82%e5%92%a9","status":"publish","type":"post","link":"https:\/\/tommykwan.com\/blog\/aviation\/vhhh-%e9%a6%99%e6%b8%af-%e6%97%a2-transition-altitude-%e5%90%8c-transition-level-%e4%bf%82%e5%92%a9\/","title":{"rendered":"VHHH (\u9999\u6e2f) \u65e2 transition altitude \u540c transition level \u4fc2\u54a9?"},"content":{"rendered":"

Reference: ENR 1.7<\/strong> ALTIMETER SETTING PROCEDURES<\/strong><\/p>\n

1.2 The transition altitude<\/strong><\/span> (TA) is 9 000 ft<\/strong><\/span>.
\n1.3 The transition level<\/strong><\/span> is FL110<\/strong><\/span>.<\/p>\n

 <\/p>\n

\u4e0b\u9762\u4e00\u5806\u5b57\u65e2\u5c0f\u7e3d\u7d50:<\/p>\n

    \n
  1. \u9664\u5de6\u597d\u7279\u6b8a\u60c5\u6cc1, \u96e2\u6e2f\u65e2\u904e\u5de6 TA climb \u5c31\u8f491013.2 ; \u5230\u6e2f\u65e2\u904e\u5de6FL110 descent \u7dca\u5c31\u8f49QNH<\/li>\n
  2. \u4efb\u4f55\u6642\u9593\u4e0d\u61c9\u8a72\u5728TA \u5230 FL120 \u5462\u500blayer \u5230cruise –\u00a0 \u4e00\u4fc2climb, \u4e00\u4fc2descent!<\/li>\n<\/ol>\n

     <\/p>\n

     <\/p>\n

    Note:
    \ni) When<\/strong> the QNH<\/strong> value at Hong Kong International Airport is 979 hPa or below<\/strong> ATC will inform pilots of the transition level<\/strong> by Arrival ATIS broadcast or voice communication.
    \nii) The lowest QNH value recorded by the Hong Kong Observatory to date is 953.2 hPa<\/p>\n

    (Wanda sets the record. As the eye of Wanda passed over the territory, the barometer plunged to the all-time low of 953.2 hPa on 1 September 1962.)<\/p>\n

    Also ref: Tropical Cyclones necessitating the issuing of the Hurricane Signal No.10 \uff5cHong Kong Observatory(HKO)\uff5cTropical Cyclone<\/a><\/p>\n

     <\/p>\n

    Transition altitude:<\/strong> the altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes.
    \nTransition layer<\/strong>: the airspace between the transition altitude and the transition level.
    \nTransition level : <\/strong>the lowest flight level available for use above the transition altitude.<\/p><\/blockquote>\n

     <\/p>\n

     <\/p>\n

    2 Basic Altimeter Setting Procedures
    \n2.1 Procedures
    \n2.1.1 Aircraft operating beyond<\/strong> a range of 50 NM from Hong Kong International Airport<\/strong>, AND those within 50 NM<\/strong> of the airport but at or above the transition level<\/strong> will use an altimeter setting of 1013.2 hPa<\/strong>.
    \n2.1.2 Aircraft operating within 50 NM<\/strong> of Hong Kong International Airport at or below<\/strong> the transition altitude<\/strong> (9 000 ft<\/strong>) will use the local QNH<\/strong> setting supplied by ATC.
    \n2.1.3 Aircraft wishing to operate within 50 NM of Hong Kong International Airport<\/strong> shall not<\/strong> flight plan to cruise at levels between the transition altitude and FL120.<\/strong><\/span><\/p>\n

     <\/p>\n

    2.2 Change of Settings<\/p>\n

    \u5230\u6e2f\u65e2 (Arriving)<\/strong><\/p>\n

    2.2.1 Arriving aircraft at Hong Kong International Airport will change from an altimeter setting of 1013.2 hPa to the local QNH setting :-<\/p>\n