Accuracy: Measure of exactness, possibly expressed in percent.
Acquire: To begin reception of useful data ...
DME accuracy should be within 3% or 1/2 mile which ever is greater. Code every 37.5 seconds
DME is slant range so will be different from GPS
Code is at an unpleasant high pitch.
DME and transponder frequencies can conflict.
Radar accuracy varies: Traffic near a radar site can be located to within a few dozen feet, but at long distances, there can be errors of up to a mile or so.
When the accuracy of the compass is suspected.
After any cockpit modification or major replacement involving ferrous metal.
Whenever a compass has been subjected to a shock; for example, after a hard landing or turbulence.
Omega - high accuracy, very-low frequency (VLF) long range navigation system of the hyperbolic type, covering the entire earth down to the surface from eight ground based transmitters.
More recently, the accuracy of GPS navigation was ratcheted up a notch when the FAA turned on the WAAS (wide area augmentation system) signal for use by general aviation on July 10, 2003.
"Lidar Measurements of Wind in the Planetary Boundary Layer: The Method, Accuracy and Results from Joint Measurements with Radiosonde and Kytoon," J. of climate and Applied Meteorology, vol. 25, pp 990-1001 (Jul. 1986).
Since air becomes less dense as altitude increases, an air speed indicator loses accuracy so the indicated airspeed is what the pilot sees on the instrument although the aircraft will be traveling at a higher true air speed.
is intended to characterize an airspace through a statement of the navigation performance accuracy (RNP type) to be achieved within the airspace.
Flight in the mountains usually results in a higher workload, the cause being navigational accuracy, constant lookout for other aircraft and the high altitude (hypoxia).
While GPS devices are very common and extremely precise in the civilian world, there is a certain degree of inaccuracy that is factored into the system.
The author and publisher have made every effort in the preparation of this book to insure the accuracy of the information. However, the information in this book is sold without warranty, either express or implied. Neither the author nor COMPUTE! ...
Area Navigation (RNAV) and Required Navigation Performance (RNP) procedures and improvements in positional accuracy from Automatic Dependent Surveillance - Broadcast (ADS-B) permit aircraft to operate more closely at optimal altitudes and follow ...
Developed at first for military use, then widespread on commercial and private aircraft, it is now expected to replace the ground-based navigational systems for its accuracy and reliability.
GPU: Ground Power Unit ...
VOT- A ground facility which emits a test signal to check VOR receiver accuracy. Some VOT's are available to the user while airborne, and others are limited to ground use only.
(See AIM.)
(See AIRPORT/FACILITY DIRECTORY.) ...
Localizer Type Directional Aid (LDA): A facility of comparable utility and accuracy to a localizer that is not aligned with the runway having an angle of divergence exceeding 3 degrees but not exceeding 30 degrees.
Various types of approaches offer different degrees of accuracy. Some approaches depend upon timing portions of the flight with a stopwatch. 2) When preceeded by a geographical name (eg. New York Approach), ...
Global Positioning System (GPS) - A system of 24 satellites used as reference points to enable navigators equipped with GPS receivers to determine their latitude, longitude, and altitude. The accuracy of the system can be further refined by using ...
WAAS (Wide Area Augmentation System) An enhancement to the GPS system providing greater navigation accuracy and system integrity and permitting GPS to be used for precision instrument approaches to most airports.
DGPS (Differential Global Position System) - This system uses a ground station to correct the code received from satellite for a 5 meter accuracy.
DME allows a pilot to determine the airplane's distance from a point on the ground that has a DME station. In and of itself, this is useful, but combined with a VOR, pilots can determine their location with excellent accuracy.
If you are using a GPS or a landmark to check the accuracy of your VOR receiver at some arbitrary off-airway location, add the VOR twist to whatever your VOR receiver is saying, then compare that to the actual magnetic bearing.
cools and descending air warms, given no heat is added or taken away. The rate for dry air is based on 5.4° F per 1000' altitude (1° per 100 meters); saturated rates vary with barometric pressures and temperatures, and must be adjusted for accuracy.
Used correctly, these systems can provide increased navigation capability and accuracy, instrument approaches in locations where no ground-based approach aids are available and better situational awareness.
Therefore the aircraft has been fitted with a special instrumentation scheme which will automatically record the required parameters with the accuracy. The data thus recorded can then be analysed after sortie is over.
The bomber flies over the mirror, which is suitably mounted on the ground. A light is flashed in the aeroplane at the release point of the bomb and this is plotted on the mirror. In this way the accuracy of the "bombing" can be determined.
throttle and have a friend, without glasses, read the scale. Thrust in pounds should be approximately four times the horsepower for a cruise prop, five times the horsepower for a climb prop. You may want to do it several times for better accuracy.
 See also: Aircraft, Flight, Navigation, Aviation, Pilot
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