Steven P. McNicoll wrote:
"Guy Elden Jr" wrote in message
oups.com...

Something I've always wondered... why do TRSAs even exist?



Good question. Nobody seems to know the answer.

Plain language: Because they do not have the trafic load required to be
Class C but much more traffic than what is being loaded into the class D
airports. AIM language: TRSA do not meet the ARSA criteria for
conversion to a Part-71 defined airspace. These criteria are relatively
stingent.




Seems like a dangerous proposition to choose some airports as having the
concept of a voluntary controlled airspace?



What seems dangerous about it? TRSAs exist in Class D and Class E airspace
but are not in themselves controlled airspace.
It is a place to get flight following and approach control



Why not a Class C (their closest
cousin as far as I can tell)?

See above



Part of the Airport Radar Service Area (ARSA) plan was to eventually replace
all TRSAs with ARSAs, which are nor Class C airspace. But not all TRSAs met
ARSA requirements.

True




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Scott F. Migaldi
CP-ASEL-IA
MI-150972

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