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Various tools

March 30, 2005

Radar image for the Bay area

Posted by Elie at 05:53 PM

March 18, 2005

Useful frequencies in the Bay Area

Emergency frequency 121.5

San Carlos (KSQL)
Atis 125.9
Tower 119.0
Ground 121.6

Palo Alto (KPAO)
Atis 135.27
Tower 118.6
Ground 125.0

Hayward (KHWD)
Atis 126.7
Tower 120.2
Ground 121.4

Livermore (KLVK)
Atis 119.65
Tower 118.1
Ground 121.6

Half Moon Bay (KHAF)
CTAF 122.8

Byron (C83)
AWOS 123.775
CTAF 123.05

Tracy (KTCY)
AWOS 118.375
CTAF 122.8

Open flight plan 122.5

Frequencies of the major general aviation airports in the Bay Area

Posted by Elie at 09:30 PM

March 13, 2005

Decoding METARs

Weather descriptors

BC Patches
BL  Blowing
DR  Low drifting
FZ  Freezing or super-cooled
MI  Shallow
PR  Partial
SH Showers
TS  Thunderstorm

Obstructions to visibility

BR  Mist
DS  Dust storm
DU  Widespread dust
DZ  Drizzle
FC  Funnel cloud
+FC Tornado or waterspout
FG  Fog
FU  Smoke
GR  Hail
GS  Small hail or snow pellets
HZ  Haze
IC  Ice crystals
PE  Ice pellets
PO  Dust or sand devils
PY  Spray
RA  Rain
SA  Sand
SG  Snow grains
SN  Snow
SQ  Squall
SS  Sand storm
UP  Precipitation type unknown
VA  Volcanic ash

Intensity values

Minus sign Light
No sign Moderate
Plus sign Heavy

Cloud types

CB  Cumulonimbus
CIR  Cirrus
TCU  Towering cumulus

Cloud cover

Cloud coverage is reported in octas.  One octa is one eighth of the sky

BKN  Broken (5 to 7 octas)
CLR  Clear
FEW  Few (zero to 2 octas)
OVC  Overcast (more than 7 octas)
SCT  Scattered (3 to 4 octas)
SKC  Sky clear
VV  Vertical visibility (indefinite ceiling)

Additional abbreviations

AO1  Automated observation without precipitation discriminator
AO2  Automated observation with precipitation discriminator
AMD  Amended forecast
Used as suffix to indicate minute when precipitation started
Example: RAB12 - rain began at 12 minutes past the hour
BECMG  Becoming
BINOVC  Breaks in overcast
COR  Correction to the observation
Used as suffix to indicate minute when precipitation ended
Example: SNE45 - snow ended at 45 minutes past the hour
FLDURC [Flight level] during climb, as given in a pilot report
FLDURD [Flight level] during descent, as given in a pilot report
FM  From
LDG  Landing
NO  Used as a suffix to other codes, meaning not available.  Example: RVRNO
NSW  No significant weather (means only that previously reported
precipitation or obstruction to visibility has ended)
PK WND Peak wind
PROB  Probability (followed by two-digit percentage)
PRESFR  Pressure falling rapidly
Runway used in RVR measurement
RY  Runway
RWY  Runway
RVR  Runway visual range, in feet, as measured by an optical transmissometer
 
SLP Sea level pressure, followed by the last three digits in millibars and tenths
Examples: SLP041 - 1004.1 mb; SLP 986 - 998.6 mb
T Sometimes used in place of TO (see below)
TEMPO  Temporarily, followed by two pairs of digits giving the hours between which the forecast conditions are expected.  "Temporarily" means that the conditions may occur only during part of the period
Example: TEMPO1315 +SHRA - temporarily, heavy rain showers between 1300 and 1500Z
TKOF  Takeoff
TO Used in remarks to give temperature to the nearest tenth of a degree, followed by two groups of four digits.  In each group, the first digit is either a zero (above freezing) or a 1 (below freezing), and the other three digits give the temperature value in Celsius
Example TO00311074 - temperature +3.1 C, dew point -7.4 C
Varies (used to modify wind direction or RVR)
Example: RVR 600 V 1200 - runway visual range varies from 600 to 1200 feet
VC  Vicinity
VRB  Variable wind direction when wind speed is less than six knots
WS  Wind shear


Review the signification of most codes for decrypting METARs

Posted by Elie at 11:38 PM

February 23, 2005

Pilot Mnemonic Reminders

We put these useful mnemonics check lists together for our own needs. We thought that you could also benefit from them when flying N236SP.

CIGAR - Runup Or Ground Check
Controls check, Instruments set, Gas (fuel on proper tank, pump on), Attitude (flaps and trim set) and Runup (magnetos check)

Lights, Camera, Action - Before Takeoff
Lights (strobe, landing light, and navigation lights). Camera is the transponder. Action is for mixture, fuel boost pump, flaps and trim.

BLITTS - Before Takeoff
Boost pump and mixture, Lights, Instruments set, Transponder, Time and Safety (seatbelts, doors and windows)

Charlie GUMPS - Before landing
Carb heat, Gas (fuel on the proper tank and pump), Undercarriage, Mixture, Propeller, Safety (doors, windows, seat belts)

CCCC - Go-Around
Cram it, clean it, cool it, and call it. Cram it refers to adding full power. Clean it refers to retracting flaps (in increments) and landing gear. Cool it is a reminder to open the cowl flaps / carb heat, and call it refers to announcing your action.

FACTS - After Landing
Flaps up, Auxiliary fuel pump off, Cowl flaps open and/or carburetor heat off, Transponder to standby, and Switches (pitot heat off and lights as required).

MIDGET - Securing The Aircraft
Master switch off, Ignition (magnetos) off, Doors and windows latched, Gust lock installed, ELT off, and Tiedowns secured.

A list of useful mnemonic reminders, such as the famous GUMPS but also others. Have you heard about CIGAR - although you are not supposed to smoke in the plane?

Posted by Elie at 11:54 PM

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