Controllers at the Shanwick Oceanic Area Control Centre have warned jet operators against abusing an apparent loophole in the Reduced Vertical Separation Minimums (RVSM) approval process. A ``great number'' of aircraft routinely file for RVSM flight levels with non-RVSM-approved aircraft, the controllers allege, by claiming their flights are ``mercy or humanitarian'' missions exempt from Europe's new RVSM requirements. All aircraft filing for RVSM altitudes must meet specific ...


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