Similar to OIM

00A - Total RF Heliport, Bensalem, Pennsylvania USA
00B - Buckeye Executive Heliport, Hebron, Ohio USA
00C - Animas Air Park Airport, Durango, Colorado USA
00E - former code for Lava Hot Springs Airport, Lava Hot Springs, Idaho USA
00F - Broadus Airport, Broadus, Montana USA
00M - Thigpen Field Airport, Bay Springs, Mississippi USA
00N - Bucks Airport, Bridgeton, New Jersey USA

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