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Display : Screen displayed on the LCD
Frequency deviation range : The range of variation of the Q0N frequency used for transmission
waves of a solid-state radar. Generally, the greater the frequency
deviation range, the higher the resolution in the range direction.
Hydrographic and Oceanographic Department :
Hydrographic and Oceanographic Department of Japan Coast Guard. Publisher of ENC
Import (Chart Maintenance) : A procedure of enabling the chart supplied by Base CD to be
displayed on ECDIS
Interswitch Unit : A device to switch over two or more radar display units and two or
more radar antennas
Leg : Line between two consecutive waypoints
Lost AIS target : A target symbol representing the last valid position of an AIS target
before the reception of its data was lost, or its last dead-reckoned
position.
Lost tracked target : One for which target information is no longer available due to poor, lost
or obscured signals.
Power amplifier : A radio frequency amplifier circuit consisting of semiconductor
elements used for solid-state radars. It employs a high frequency, high
power FET.
Primary : Main positioning sensor
Pulse compression : Correlation processing performed when a transmitted chirp signal is
received by a solid-state radar after reflecting off the target. This
processing gain enables the radar to have necessary detection
capability even when a transmission power is low.
Radar beacon : A navigation aid which responds to the radar transmission and
generates radio wave
Range : An area of the chart displayed on the screen. Represented by one half
of the length of the chart display screen.
Reference target : A fixed target specified to calculate the speed over the ground
Report : User report to be issued periodically for using the Dynamic License
method of Jeppesen continuously
Rubber band : Border that indicates the selected range.
Scale : The display scale
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