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Air Traffic Control (7110.65) | ATC | Effective: | 07-15-99 | Updated: | 04-02-99 |
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When assigning airspeeds, use the following minima:
a. To aircraft operating between FL 280 and 10,000 feet, a speed not less than 250 knots or the equivalent Mach number.
NOTE-
[1] On a standard day the Mach numbers equivalent to 250 knots CAS (subject to minor variations) are:
FL 240-0.6
FL 250-0.61
FL 260-0.62
FL 270-0.64
FL 280-0.65
FL 290-0.66.
[2] If a pilot is unable to comply with a speed assignment lower than the minima specified in this paragraph, the pilot will advise.
b. To arrival aircraft operating below 10,000 feet:
1. Turbojet aircraft- A speed not less than 210 knots; except when the aircraft is within 20 flying miles of the runway threshold of the airport of intended landing, a speed not less than 170 knots.
2. Reciprocating engine and turboprop aircraft- A speed not less than 200 knots; except when the aircraft is within 20 flying miles of the runway threshold of the airport of intended landing, a speed not less than 150 knots.
c. Departures:
1. Turbojet aircraft- A speed not less than 230 knots.
2. Reciprocating engine and turboprop aircraft- A speed not less than 150 knots.
d. Helicopters- A speed not less than 60 knots.
REFERENCE-
FAAO 7110.65, METHODS, Para 5-7-2.
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