IFATCA The Controller - 1st quarter 2004

Page 10

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Myanmarand China,VHFradiocommunications are often interferedwith by illegal high-power mobile phones, and the transition between RVSMin feet in DhakaFIRandCVSMwith China metric in Kunmin FIR, is carried out in the Yangon FIR from Myanmar. An RVSM/TF meeting worked out a flight level allocation scheme(FLAS)wherebyIndia does not assign RVSMFL310,350 and 390 for the eastbound traffic, and Kunmincarriesout the transition from Chinametricto RVSMFls. Aircrewchange their altitude in accordancewith the FLASin caseof communicationinterference. Whatarethe prospectsfor RVSMin Asia/Pacific? Oneof the outstandingissuesis the FLOS.There were pros and cons among States in the WPAC/SCS areaon continuationof the modified single alternate FLOS.As the Philippinesand Thailandare locatedin the marginalareaof the WPAC/SCS area, which meansthey bear the burden of the transition between the single alternateFLOSin the surroundingareasand the modifiedsinglealternateFLOSin the WPAC/SCS area,theywant to changethe FLOSto the single alternateFLOS.On the other hand, Singapore, IATAand IFALPA supportthe continuationof the modifiedsinglealternateFLOS. Another issueis RVSMexemptionsfor military aircraft. Theoperationof non-RVSMapproved aircraft in RVSMairspacehas an impact on controllersbecausewith 2000 foot separation being necessaryfor the non-RVSM(military) aircraft,the controllersare compelledto change the levels of other traffic. The exemption procedures alsoneedto be alignedwith thoseof neighboringFIRs. Japanand SouthKoreawill implementRVSMin their whole airspacein the first half of 2005. More flights connectingSoutheastAsia and North Americamay utilize Kamchatkaroutes, whichmeanmoreflightsoverKorea.In the light of this, I believeit is crucialto reviewanewand introducethe sameFLOSin this region, which would otherwise bring about transitions betweenthe differentFLOS.

RVSMvs. China Metric

planof RVSMwould be in airspaceaboveFL330 to cater for their domestic non-RVSMfleet. However,the departuresfrom the Malaysian Peninsulaairportscan barely attain FL320over the Indian subcontinentdue to their heavy weight, so the RVSMimplementationabove FL330 does not make sense! India was reconciledlater with the operators,loweredthe

10

No one can overstatethe importanceof air safety and the transition may well have an impacton air safetyunlessattentionis paidto it. floor and ended up making their domestic There are also many ramifications to be airspacenon-exclusive airspace.However,India addressedsuchas largescaleweatherdeviation had to adopt verycomplexFLASbasedon time in Typhoonseasons.RVSMimplementationin window,directionof flight, airways,etc. Asia/Pacificregionhas not beencompletedyet in that senseand is still on-going. Havingsaidthat the transitionshouldbe carried out in a radar environment with direct Specialthanksgo to Mr.Yoshikilmawakafor his communications,the reality is different. In help to this article.

THE CONTROLLER


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