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Civil Aviation Act, 2009 (Act No. 13 of 2009)

Regulations

Civil Aviation Regulations, 2011

Part 174 : Meteorological Information Services

Subpart 4 : Provision of Meteorological Information

174.04.7 SIGMET information

 

(1) A MWO established in terms of regulation 174.02.02(2) shall prepare and issue SIGMET information for specified hazardous en-route weather including volcanic ash and tropical cyclones within its area of responsibility.

 

(2) A MWO shall—
(a) base volcanic ash cloud and tropical cyclone SIGMET on advisory information received from VAACs and TCACS;
(B) keep a period of validity of a SIGMET message for normal weather phenomenon too a maximum of four hours;
(c) issue SIGMET for normal weather phenomenon not more than four (4) hours before commencement of a period of validity;
(d) cancel a SIGMET when a phenomenon is no longer occurring or expected to occur;
(e) issue SIGMET for volcanic ash and tropical cyclone as soon as practicable but not more than 12 hours before a commencement of a period of validity;
(f) update SIGMET for volcanic ash and tropical cyclone every 6 hours;
(g) ensure that the period of validity of volcanic ash cloud and tropical cyclone SIGMET is recorded for up to six (6) hours; and
(h) request that information about volcanic ash be published in a NOTAM.

 

(3) A MWO shall maintain close coordination with associated area control centre or flight information centre to ensure consistency of information published in a SIGMET and a NOTAM.

[Regulation 174.04.7(3) substituted by regulation 8(m) of Notice No. 5008, GG50880, dated 28 June 2024 (Twenty-Ninth Amendment of the Civil Aviation Regulations, 2024)]

 

[Regulation 174.04.7 inserted by regulation 19 of Notice No. R. 520, GG 42632, dated 29 March 2019 (Twentieth Amendment of the Civil Aviation Regulations, 2019)]