JRC JLN-652 - Absolute Current Standard; Relative Current Standard

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4.1.3 Absolute Current Standard: Doppler / GPS / Auto-GPS WT / Auto-WT
・Function・ When absolute current (*1) (current speed to ground) is measured, the ship speed data is
set as a standard.
Set the Doppler /Auto-WT /WT when the navigation equipment such as GPS is not
connected.
Operation Standard Menu: [MENU] key/Menu screen/Measure setting≫ /[ENT] key/Absolute current
standard: Doppler/GPS/GPS at water tracking
Selection Frame Menu: [□] key/ Enclose “Current” with the frame /[MENU] key/ “Current
Speed and Direction / Relative Current Layer” menu/Absolute current standard:
Doppler/GPS/GPS at water tracking
Display
The absolute current standard is displayed.
GPS/WT: It is displayed that the absolute current standard
is set to GPS/WT.
In the GPS standard, the absolute current is measured
based on the ship speed data of GPS and displayed. It is
necessary to connect the navigation equipment such as
GPS with this device to use the GPS standard.
Under the WT standard, Measure the tidal current
based on ship speed to water.
Non-display (Doppler): When the absolute current standard is set to Doppler, it is not
displayed.
In the Doppler standard, the absolute current is measured based on ship speed by bottom
tracking of the Doppler data and displayed.
Auto-GPS / Auto-WT: When the absolute current standard is set to Auto-GPS / Auto-WT,
it switches based on Doppler standard when the Doppler data is bottom tracking, and it
switches automatically based on GPS / WT standard at water tracking.
4.1.4 Relative Current Standard: Selection of Standard Layer.
・Function・ When relative current (*2) is measured, the based current layer is selected from the A-E
layer.
Operation Standard Menu: [MENU] key/Menu screen/Measure setting≫ /[ENT] key/Relative current
standard: A-E layer
Selection Frame Menu: [□] key/ Enclose “Current” with the frame /[MENU] key/ “Current
Speed and Direction / Relative Current Layer” menu/ Relative current standard: A-E layer
About relative current standard
For instance, when the relative current
standard is set to "E layer", A layer, B layer,
C layer, and D layer are displayed
respectively based on E layer as "AE" "BE"
"CE" "DE".
*1 Absolute current: Refer to 6.1.1 “Absolute current”.
*2 Relative current and standard current layer: Refer to 6.1.2 “Relative Current and Standard Current Layer”.
Relative Current Display
Relative Current
Standard Layer
Measure
-ment
Layer
Current
Speed
Current
Direction