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10.1 absorbed dose Gy rd
10.2 absorbed dose rate Gy/s rd/s
10.4 dose equivalent Sv rem
10.5 radiation exposure C/kg R
10.6 exposure rate C/kg⋅s R/s
All non−SI alternative units listed in this table will continue to be utilized where permitted.
(1.1, 1.3, 1.5, 1.7, 4.1, 4.7, 4.15, 4.16)
31 JULY 08
AIP
United States of America
GEN 1.7−27
15 MAR 07
Federal Aviation Administration Nineteenth Edition
ANNEX 6 − OPERATION OF AIRCRAFT
PART I
Chapter 1 Definitions
Aerodrome
operating
minima
This term is not used in the U.S.
Category I
(Cat I)
operation
For a Category I operation, the U.S. requires a decision height (DH) of not less than 200 feet and
either visibility of not less than 1/2 mile or a runway visual range of 2,400 feet (RVR 1,800 feet
with operative touchdown zone and runway centerline lights).
Category II
(Cat II)
operation
The U.S. requires that Category II provide approaches to minima of less than 200 feet decision
height/2,400 runway visual range to as low as 100 feet decision height/1,200 feet runway visual
range.
Category IIIA
(Cat IIIA)
operation
U.S. criteria are the same as those adopted in Part 1 of Annex 6. However, the runway visual range
is expressed as not less than 700 feet (200 meters).
Category IIIB
(Cat IIIB)
operation
U.S. criteria are the same as those adopted in Part 1 of Annex 6. However, the runway visual range
is expressed as less than 700 feet (200 meters) but not less than 150 feet (50 meters).
Cruising
level
The term “cruising altitude” is used in lieu of “cruising level” in U.S. ATC phraseology.
Decision height Although not identical, the U.S. definition of decision height is not substantially different.
General
aviation
operation
General aviation is defined as all civil aviation operations other than scheduled air transportation
and nonscheduled air transport operations for remuneration or hire. The classification of general
aviation flying by powered aircraft is, as follows:
Instructional flying. Use of an aircraft for purposes of flight instruction with an instructor. The
flights may be performed by aero−clubs, flying schools, fixed−base operators, or commercial
operators.
Business flying. Use of an aircraft to carry personnel and/or property to meet the transport needs of
officials of a business, firm, company, or corporation. These flights may be performed by a
commercial pilot or by a private pilot.
Pleasure flying. Use of an aircraft for personal or recreational purpose not associated with a
business or profession.
Aerial work. Use of an aircraft for activities such as: (1) crop dusting, chemical or fertilizer
spraying, seed dissemination, prevention of frost formation, insect fighting, animal herding, or
(2) aerial photography, patrol and surveillance, prospecting, construction, advertising, medical
relief, and rescue work.
Other flying. All flights by pilots for maintaining their flight proficiency should also be included
under this heading as well as all general aviation flights that cannot be included in the above four
categories.
31 JULY 08
AIP
United States of America
GEN 1.7−28
15 MAR 07
Nineteenth Edition Federal Aviation Administration
Instrument
meteorological
conditions
(IMC)
Visual
meteorological
conditions
(VMC)
The U.S. difference, as stated in the Supplement to Annex 2, 5th Edition, dated February 1967 as
amended by Amendment 1 is as follows:
It will be impracticable to implement the terms ‘‘instrument meteorological conditions’’ and ‘‘visual
meteorological conditions,’’ abbreviated as ‘‘IMC’’ and ‘‘VMC’’ as they appear in Chapter 1,
Definitions, and within the other paragraphs of the Annex where they appear.
Use of the terms ‘‘IFR conditions’’ and ‘‘VFR conditions’’ rather than ‘‘instrument meteorological
conditions’’ and ‘‘visual meteorological conditions’’ will have no effect with respect to the safety of
air navigation. The terms ‘‘IFR conditions’’ and ‘‘VFR conditions’’ have been in effect in the U.S.
for many years and are well known to all pilots and providers of the various aeronautical services.
Therefore, a change from the present phraseology to the new phraseology would, in so far as the
U.S. is concerned, impose a change which is not justified from the standpoint of improvement of the
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