Leerjet 35/36 Developed for Training Purposes 5-41
February 1998
Flight Planning
2SM. Prevailing horizontal visibility in statute miles. In the U.S.,
issued in statute miles with the appropriate suffix (SM)
appended.
When a marked directional variation exists, the reported mini
mum visibility is followed by one of the eight compass points to
indicate the direction (e.g., 2SMNE).
R22L/1000FT. The runway visual range group. The letter R
begins the group and is followed by the runway description
(22L). The range in feet follows the slant bar (1000FT). In other
countries range is in meters and no suffix is used. TSRA
OVC010CB. Thunderstorms (T S) and rain (R A) with an over-
cast layer at 1,000 ft and cumulonimbus clouds.
18/16. Temperatures in degrees Celsius. The first two digits
(18) are observed air temperature; the last two digits (16) are
dew point temperature. A temperature below zero is reported
with a minus (M) prefix code (e.g., M06).
A2990. Altimeter setting. In the U.S., A is followed by inches
and hundredths; in most other countries, Q is followed by hec-
topascals (i.e., millibars).
RERAB25. Recent operationally significant condition. A two
letter code for recent (RE) is followed by a two letter code for
the condition (e.g., RA for rain). A code for beginning or ending
(B or E) and a two-digit time in minutes during the previous
hour. When local circumstances also warrant, wind shear may
also be indicated (e.g., WS LDG RWY 22).
.
.
NOTE: More than one cloud layer may be reported.
NOTE: A remark (RMK) code is used in the U.S. to precede
supplementary data of recent operationally significant
weather.
NOTE: RMK [SLP 013] breaks down SEA LVL press to
nearest tenth (e.g., 1001.3 reported as SLP 013).
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