|
Deviating from normal
|
|
Deviating from normal
|
Related Terms |
SCUFFING
Abnormal engine wear due to localized welding and fracture. It can be prevented through the use of anti-wear, extreme-pressure and friction modifier additives.
|
IONOSPHERIC STORM
An ionospheric disturbance characterized by wide variations from normal in the state of the ionosphere, such as turbulence in the F-region, absorption increase, height increase, and ionization density decreases. The effects are most marked in high magnetic latitudes and are associated with abnormal solar activity.
|
LOOMING
1. An apparent elevation of distant terrestrial objects by abnormal atmospheric refraction. Because of looming, objects below the horizon are sometimes visible. 2. The appearance indistinctly of an object during a period of low visibility.
|
MAGNETIC STORM
A disturbance in the earth’s magnetic field, associated with abnormal solar activity, and capable of seriously affecting both radio and wire transmission.
|
SEA-AIR TEMPERATURE DIFFERENCE CORRECTION
A correction due to a difference in the temperature of the sea and air, particularly the sextant altitude correction caused by abnormal terrestrial refraction occur- ring when there is a nonstandard density lapse rate in the atmosphere due to a difference in the temperature of the water and air at the surface.
|
SEA-TEMPERATURE DIFFERENCE CORRECTION
A correction due to a difference in the temperature of the sea and air, particularly the sextant altitude correction caused by abnormal terrestrial refraction occurring when there is a nonstandard density lapse rate in the atmosphere due to a difference in the temperature of the water and air at the surface.
|
SECOND-TRACE ECHO
A radar echo received from a target after the following pulse has been transmitted. Second-trace echoes are unusual except under abnormal atmospheric conditions, or conditions under which super-refraction is present, and are received from targets at actual ranges greater than the radar range scale setting. They may be recognized through changes in their position on the radarscope on changing the pulse repetition rate; their hazy, streaky or distorted shape; and their erratic movements on plotting. Also called MULTIPLE-TRACE ECHO.
|
SINKING
An apparent lowering of distant terrestrial objects by abnormal atmospheric refraction. Because of sinking, objects normally visible near the horizon sometimes disappear below the horizon. The opposite is LOOMING.
|
HYPOTHERMIA
Abnormal lowering of internal body temperature (heat loss) from exposure to cold air, wind or water.
|
ABNORMAL TIME
During a time study, an elapsed time for any element which is excessively longer or shorter than the median of the elapsed times. Also known as abnormal reading.
|
MarineProHelp 2018 - 2021
