Measurement With Two Arbitrary Points - JRC JMA-9123-7XA Instruction Manual

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JMA-9100 Instruction Manual 4.MEASUREMENT OF RANGE AND BEARING
4.2.3

Measurement with Two Arbitrary Points

Procedures
1) Press the [EBL2] key.
The
will be shown on the PPI display.
2) Press the [EBL] dial to select C for the EBL2 starting point mode
switching located at the upper right of the display.
3) Put the cursor on the point A of the two points between which
measurement is made, and left-click.
Refer to the figure below.
4) Move the EBL2 to the other point B by turning the [EBL] dial.
Press the [VRM2] key.
5)
When VRM2 is selected, ● (intersection marker) will appear on the dotted line of EBL2.
Move the intersection marker on the dotted line to point B by
6)
turning the [VRM] dial.
The range and bearing between the two points will be shown in the VRM2 range and EBL2
bearing (located at the upper right of display).
A
Cape
270
Own ship's position
Similarly, EBL1 can also be used for measuring the bearing and range between
two points. In this case, perform the above procedure reading EBL2 as EBL1 and
VRM2 as VRM1.
EBL2
( located at the upper right of the display) will be highlighted, and EBL2
6.00NM
0
90.0°
B
Cape
VRM2
180
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4.2 MEASUREMENT OF RANGE AND BEARING
EBL2
90
Bearing and range between points
A and B in this figure:
True bearing 90.0 °
Range 6.00 NM
4