JRC JLN-652 - Ship Speed Display; System Mode

4-6
4.1.5 Ship Speed Display: Doppler/GPS
・Function・ The ship speed data is selected.
Set it to Doppler (ship speed measurement by bottom tracking・water tracking) when the
navigation equipment such as GPS is not connected.
Operation Standard Menu: [MENU] key/Menu screen/Measure setting≫ /[ENT] key/Ship speed
display: Doppler・GPS
Selection Frame Menu: [
□] key/ Enclose “Ship speed・Course” with the frame /[MENU]
key/ Ship speed・Course menu/ Ship speed display: Doppler・GPS
Display
Display of the ship speed
GPS: It is displayed when the ship speed display is
set to GPS.
In GPS, the ship speed data of GPS is displayed.
It is necessary to connect the navigation equipment
such as GPS with this device to display ship speed
by GPS.
Doppler: When the ship speed display is set to Doppler, it is displayed as BT or WT.
Doppler measures and displays the ship speed by bottom tracking or water tracking(*1) of
the Doppler data.
4.1.6 System Mode: Auto / Manual water tracking/Manual Bottom tracking
・Function・ The measurement mode when ship speed is measured by Doppler and displayed is
selected.
The standard is set to [Auto].
Operation Standard Menu: [MENU] key/Menu screen/Measure setting≫ /[ENT] key/System mode:
Auto/Manual W.T. /Manual B.T.
Selection Frame Menu: [□] key/ Enclose “Ship speed/Course” with the frame /[MENU]
key/ Ship speed/Course menu/System mode: Auto・Manual W.T.・Manual B.T.
About system mode
Automatic: Though ground A is usually displayed, when it becomes impossible to
measure the ship speed by bottom tracking as the bottom of the sea or more depth
becomes deep (about 400(JLN-650)/250(JLN-652)m(*2)), it switches to water tracking
display automatically (*3).
Manual water tracking: The ship speed by water tracking is always displayed. (*4),(*6)
Manual bottom tracking: The ship speed by bottom tracking is always displayed. (*5),(*6)
*1 Whether the sip speed by bottom tracking or water tracking is displayed follows the setting of "4.1.6 ship speed measurement
mode".
*2 The maximum bottom of the sea depth to which the ship speed by bottom tracking can be measured is different according to the
bottom sediment and the oceanographic condition.
*3 Select GPS by menu/measurement setting/ship speed display when you display the ship speed (to ground) by GPS.
*4 In the automatic mode of operation, correct the ship speed by water tracking is measured and displayed after it makes to
manual water tracking when the large fish group is recognized bottom of the sea by mistake.
*5 When the ship speed by bottom tracking cannot be measured, "***" is displayed.
*6 This setting doesn't influence the current measurement.
Kind at ship speed
Kind at ship
speed