JRC JMR-5425-7X - Setting Own Ship Speed; Entering the Ships Heading;Own Ships Speed Manually; Switching Own Ship Speed Device

5-29 Section 5 Basic Operation of the Radar
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APP A
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5.4.14 Setting own ship speed
5.4.14.1 Switching own ship speed device
1 Select the ship speed device from the [STW] combo box of own ship’s information.
Memo
• When using 1-axis log, heading speed component can be detected, but transverse speed
component cannot be detected. Then leeway effect (component drifted by wind) cannot be
detected.
• When using 2-axes ground log, its accuracy in shallow waters may be deteriorated, and its
speed in deep sea areas may be unable to be detected.
• When using a GPS, COG accuracy is less than ±3° at speed: from 1kn to 17kn, and is less
than ±1° at speed: more than 17kn.
5.4.14.2 Entering the ship’s heading/own ship’s speed
manually
If any of the devices connected to this equipment (example: Log) malfunctions, use the following
procedure to input the ship’s heading/own ship’s speed so as to make the target tracking device and
the true motion display available.
1 Select [Menu] from the corresponding combo box.
The [Sensor Selection/Status] dialogue box is displayed.
2 To input ship’s heading manually, select [MAN] from the [HDG] combo box. To input
own ship’s speed manually, select [MAN] from the [STW] combo box.
3 Click on the input box.
4 Enter a numeric value by using the software keyboard.