Garmin GNS 480, Pilot'S Manual

Page: 37 / 160

29
Basic Operation
Selectable Nav Data Fields for Map Pages 2-4
Option Name Abbrev. Description Units
Horizontal Fig-
ure of Merit
HFOM The current 95% confidence horizon-
tal accuracy value, as reported by the
GPS engine. Feet (ft) or meters (m) in whole unit
resolution.
Minimum Safe
Altitude
MSA The minimum safe altitude in the
aircraft’s present vicinity. This value is
dashed out if data is unknown or the
database is invalid. Feet (ft) or meters (m) in whole unit
resolution.
Outside
Temperature
OAT The current outside air temperature
value. This requires an FADC or CO
Guardian input. Degrees Celsius (ºC)
True Airspeed TAS The true airspeed is only available if
an air data computer is providing it.
Value is dashed out otherwise. Knots (kt), kilometers per hour (k/h),
or miles per hour (m/h). 0 to 999
units at 1 unit resolution.
Track Angle
Error
TKE The Track Angle Error (TKE) is the
difference between the aircraft’s track
and desired track. TKE is followed by
an L or an R, indicating left or right
of DTK (if value is 0 or 180, then L/R
will not be displayed). Value is dashed
out if TRK or DTK is unavailable. 0 to 180 degrees at one-degree
resolution.
Track TRK The aircraft’s ground track angle. Value
is dashed out if position is invalid. 0 to 359 degrees at 1-degree resolu-
tion.
Moving Map