area of uncertainty


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area of uncertainty

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The area around the DR (dead reckoning) position within which, for a stated level of probability, the true position is considered to occur. Normally, the 50% level of probability is taken. The area of uncertainty is drawn as a rectangle centered around the GPI (ground position indicator) DR position whose sides are equal to 1% along the track and 3% across the track of the distance flown since resetting the GPI. In the case of air-plot DR position, it is a circle of radius of 8 NM/h for aircraft at TAS (true air speed) up to 250 knots and 20 NM/h at higher speeds.
References in periodicals archive ?
The example also points to another area of uncertainty: Honan's book is aimed at both popular and scholarly audiences, which may account for the occasional lack of documentation, the imprecise references to "a recent book" (1) and to "one modern critic" (277), and the absence of a bibliography.
"The greatest area of uncertainty concerns the cost of maintenance phase."
Even though the main area of uncertainty on this year's club is finding a reliable closer, the decision to change Papelbon's role seems sound for several reasons, and the Red Sox are committed to it.
The Association of Chartered Certified Accountants says that up to one million people who previously filled in returns have been left in a "grey area of uncertainty" by the advice from HM Revenue and Customs.
33) and thereby opens up the whole area of uncertainty between language and actuality with which Joyce's writing engages.
Baptists, like many evangelicals in North America, find themselves loitering in an area of uncertainty between new realities and new rules.
An area of uncertainty within the motor vehicle exception relates to the discovery of containers within the vehicle.
Research into CAM is in its infancy, and the area of uncertainty remains huge.
Another area of uncertainty for the long-term future of the county will be the education sector.