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时间:2011-08-13 12:47来源:蓝天飞行翻译 作者:航空
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AIRCRAFT APPROACH CATEGORY (P/CG) - A grouping of aircraft based on a speed of 1.3 times the stall speed in the landing configuration at maximum gross landing weight. An aircraft shall fit in only one category. If it is necessary to maneuver at speeds in excess of the upper limit of a speed range for a category, the minimums for the next higher category should be used. For example, an aircraft which falls in category A, but is circling to land at a speed in excess of 90 knots, should use the approach category B minimums when circling to land. The categories are as follows:)
(1) CATEGORY A - Speed less than 91 knots.
(2)
CATEGORY B - Speed 91 knots or more but less than 121 knots.

(3)
CATEGORY C - Speed 121 knots or more but less than 141 knots.

(4)
CATEGORY D - Speed 141 knots or more but less than 166 knots.

(5)
CATEGORY E - Speed 166 knots or more. (Refer to Federal Air Regulations Parts 1 and 97)


AIRCRAFT APPROACH CATEGORY DoD (USAF) - The five approach categories (A thru E) are based on 1.3 times the stall speed in the landing configuration. Operational agencies determine the category/categories of minima required and to be used by their aircraft. For example, if the final speed is 145 knots, category D minima should be used, provided other aircraft characteristics (e.g., restricted downward vision angle) do not dictate use of a higher category of minimums.
APPROACH  SPEED 
CATEGORY 
A  Speed less than 91 knots. 
B  Speed 91 knots or more but less than 121 knots. 
C  Speed 121 knots or more but less than 141 knots. 
D  Speed 141 knots or more but less than 166 knots. 
E  Speed 166 knots or more. 

NOTE: Procedures containing the word COPTER in the procedure title, i.e., COPTER VOR 190°, are approved under TERPs helicopter criteria for helicopter use only and are restricted to 90 knots or less indicated airspeed.
AIRCRAFT CLASSES (FAA-P/CG) - For the purposes of wake turbulence, separation minima, Air Traffic Control classifies aircraft as heavy, large and small as follows:
(1)
HEAVY - Aircraft capable of take-off weights of more than 255,000 pounds whether or not they are operating at this weight during a particular phase of flight.

(2)
LARGE - Aircraft of more than 41,000 pounds, maximum certificated take-off weight, up to 255,000 pounds.

(3)
SMALL - Aircraft of 41,000 pounds or less, maximum certificated take-off weight.

AIRCRAFT CLASSES (ICAO) - For the purposes of wake turbulence separation minima, Air Traffic Control classifies aircraft as heavy, medium and light as follows:

(1)
HEAVY - Aircraft with a maximum certificated take-off weight of 300,000 pounds or more.

(2)
MEDIUM - Aircraft with a maximum certificated take-off weight of less than 300,000 pounds but more than l5,500 pounds.

(3)
LIGHT - Aircraft with a maximum certificated take-off weight of 15,500 pounds or less.


AIR DEFENSE EMERGENCY - A military emergency condition declared by a designated authority. This condition exists when an attack upon the continental United States, Alaska, Canada, or United States installations in Greenland by hostile aircraft or missiles is considered probable, is imminent, or is taking place.
AIR DEFENSE IDENTIFICATION ZONE/ADIZ - The area of airspace over land or water, extending upward from the surface, within which the ready identification, the location, and the control of aircraft are required in the interest of national security.
(1)
DOMESTIC AIR DEFENSE IDENTIFICATION ZONE - An ADIZ within the United States along an international boundary of the United States.

(2)
COASTAL AIR DEFENSE IDENTIFICATION ZONE - An ADIZ over the coastal waters of the United States.


(3) DISTANT EARLY WARNING IDENTIFICATION
ZONE (DEWIZ) - An ADIZ over the coastal waters of the state of Alaska. ADIZ location and operating and flight plan requirements for civil aircraft operations are specified in Federal Air Regulations Part 99.
 
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