曝光台 注意防骗
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enter length and width of runway or "TOTAL" if runway
will be cleared to full dimensions.
13. ltem M - Enter the anticipated time of completion in
UTC.
14. ltem N - The code for Item F may be used to describe
taxiway conditions; enter "NO if no taxiways sewing the
associated runway are available.
15. ltem P - If applicable, enter "YES'followed by the
lateral distance in metres.
16. ltem R - The code for Item F may be used to describe
apron conditions; enter "NO" if the apron is unusable.
17. ltem S - Enter the anticipated time of next
obse~ation/measurement in UTC.
18. ltem T - Describe in plain language any operationally
significant information but always report on length of
uncleared runway (Item D) and extent of runway
contamination (Item F) for each third of the runway (if
appropriate) in accordance with the following scale:
Runway contamination - 10% - if less than 10% of
runway contaminated
Runway contamination - 25% - if 11-25% of runway
contaminated
Runway contamination - 50% - if 2650% of runway
contaminated
Runway contamination - 100% - if 51-100% of
runway contaminated.
EXAMPLE OF COMPLETED SNOWTAM FORMAT
GGEHAMZQZXEDDFZQZXEKCHZQZX
070645 LSZHYNYX
SWLSO149 LSZH 11070620
(SNOWTAM 0149
A) LSZH B) 11070620 C) 02 D) ... P)
C) 09 D) ... P)
C)12 D) ... P)
R) NO S)11070920 T) DEICING)
Definitions of the various types of snow
Slush. Water-saturated snow which with a heel-and-toe slapdown
motion against the ground will be displaced with a
splatter; specific gravity: 0.5 up to 0.8.
Note.- Combinations of ice, snow a d o r standing water
may, especially when rain, rain and snow, or snow is falling,
produce substances with specijic gravities in excess of 0.8.
These substances, due to their high water/ice content, will
have a transparent rather than a cloudy appearance and, at
the higher spectjic gravities, will be readily distinguishable
from slush.
Snow (on the ground).
a) Dry snow. Snow which can be blown if loose or, if
compacted by hand, will fall apart again upon release;
specific gravity: up to but not including 0.35.
b) Wet snow. Snow which, if compacted by hand, will stick
together and tend to or form a snowball; specific
gravity: 0.35 up to but not including 0.5.
c) Compacted snow. Snow which has been compressed
into a solid mass that resists further compression and
will hold together or break up into lumps if picked up;
specific gravity: 0.5 and over.
APP 2-3 25/11/04
APPENDIX 3. ASHTAM FORMAT
(see Chapter 5, 5.2.4)
(cow
heading)
(Abbreviated
heading)
SIGNATURE OF ORIGINATOR (not for transmission)
ASHTAM
ANNEX 15
(PRIORITY
INDICATOR)
(SERIAL NUMBER) I
APP 3-1
(ADDRESSEE INDICATOR(S))'
(FLIGHT INFORMATION REGION AFFECTED)
(DATUTIME (UTC) OF ERUPTION)
(VOLCANO NAME AND NUMBER)
(VOLCANO LATlTUDElLONGlTUDE OR VOLCANO RADIAL AND DISTANCE FROM NAVAID)
(VOLCANO LEVEL OF ALERT COLOUR CODE, INCLUDING ANY PRIOR LEVEL OF ALERT COLOUR CODE)^
(EXISTENCE AND HORIZONTAWERTICAL EXTENT OF VOLCANIC ASH CLOUD)^
(DIRECTION OF MOVEMENT OF ASH CLOUD)^
(AIR ROUTES OR PORTIONS OF AIR ROUTES AND FLIGHT LEVELS AFFECTED)
(CLOSURE OF AIRSPACE AND/OR AIR ROUTES OR PORTIONS OF AIR ROUTES. AND ALTERNATIVE AIR ROUTES
AVAILABLE)
(SOURCE OF INFORMATION)
(PLAIN-LANGUAGE REMARKS)
A)
6)
c)
D)
E)
F)
G)
H)
1)
J)
K)
(DATE AND TIME
OF FILING)
(VA*~S ERIAL NUMBER)
NOTES:
1. See also Appendix 5 regarding addressee indicators used in predetermined distribution systems.
2. 'linter ICAO nationality letter as given in ICAO Doc 7910. Part 2.
3. See paragraph 3.5 below.
4. Advice on the existence, extent and movement of volcanic ash cloud G) and H) may be obtained from the Volcanic Ash Adviswy Centrep)
responsible for the FIR concerned.
5. Item titles in brackets ( ) not to be transmitted.
(ORIGINATOR'S
INDICATOR)
V
(LOCATION
INDICATOR)
A
DATUTIME OF ISSUANCE (OPTIONAL GROUP)
*2 *2
Annex 15 - Aeronautical Information Services Appendix 3
INSTRUCTIONS FOR THE COMPLETION OF THE ASHTAM FORMAT
1. General
1.1 The ASHTAM provides information on the status
of activity of a volcano when a change in its activity is, or is
expected to be of operational significance. This information is
provided using the volcano level of alert colour code given in
3.5 below.
1.2 In the event of a volcanic eruption producing ash
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