OM Part C AIRFIELD BRIEFINGS Section 2 Page |1 ... - Astra Airlines

OM
Part C
AIRFIELD BRIEFINGS
Section 2
P a g e | 28
During the warm season, which lasts from May 9 to September 15, there is a 49% average chance
that precipitation will be observed at some point during a given day. When precipitation does occur it
is most often in the form of thunderstorms ( 41% of days with precipitation have at worst
thunderstorms), light rain (34%), and moderate rain (21%).
During the cold season, which lasts from November 23 to March 3, there is a 65% average chance
that precipitation will be observed at some point during a given day. When precipitation does occur it
is most often in the form of light snow ( 44% of days with precipitation have at worst light snow),
moderate snow (44%), and heavy snow (10%).
Snow
The likelihood of snow falling is highest around December 21, occurring in 72% of days. The season
in which it is relatively likely for snow to fall spans from October 12 to April 19
During peak snow season, accumulation at this location is likely. The chances of there being snow on
the ground are highest around February 2, occurring 73% of the time. The season in which snow is
relatively likely to be on the ground spans from November 1 to April 14
The snow is typically at its deepest on March 2, with a median depth of 44.8 cm; the depth exceeds
62.9 cm only one year out of ten
Wind
Over the course of the year typical wind speeds vary from 0.1 m/s to 6.8 m/s (calm to moderate
breeze), rarely exceeding 9.7 m/s (fresh breeze).
The highest average wind speed of 32.0 m/s (violent storm) occurs around April 6, at which time the
average daily maximum wind speed is 6.0 m/s (moderate breeze).
The lowest average wind speed of 2.4 m/s (light breeze) occurs around July 19, at which time the
average daily maximum wind speed is 4.7 m/s (gentle breeze).
GROUND FACILITIES
The ornithological situation in the vicinity of the aerodrome is conditioned by seasonal and daily birds
migration. The majority of birds migrate at heights 10-450 m AGL.
Nesting locations of waterfowl are water meadows of the Ob river with many watercourses and lakes.
Availability of city refuse dump located at 6 km from the airport stimulates crows concentration.
Morning, evening and seasonal birds migrations are the most hazardous.
For providing ornithological safety of flights tower controller shall organize visual observation in
aircraft take-off and landing sectors, estimate ornithological situation in the vicinity of the aerodrome
and, if necessary, give instructions for taking measures on dissipation of birds concentrations in takeoff
and approach-to-land area and instruct crews how to avoid birds concentrations.
During above mentioned periods crews are recommended to increase caution, to switch on onboard
landing lights on final approach path for dissipation of birds concentrations and also to inform the ATC
controllers about flying birds flocks.
Measures on dissipation of birds concentrations include the airport territory observation, the
abolishment of conditions stimulating birds concentration at the aerodrome, birds dissipation by flare
and gun shots, birds shooting. The registration and analysis of all cases of aircraft collisions with birds
are also carried out.
© by Astra Airlines Issue: 2 Oct., 2010 Revision No. 3 Feb. 2012