Furuno 1932 Erasing the Heading Line, North Mark, Measuring the Range, By range ring, By cursor

2.11Erasing the Heading Line, North Mark

The heading line or north mark (available with gyrocompass connection) may occasionally mask a target. To view the target, you can tem- porarily erase the heading line and north mark by pressing and holding down the [GAIN (HM OFF)] control. Release the control to re-display the marks.

Heading line

North mark

Figure 2-6 Heading line and north mark

2.12 Measuring the Range

You can measure the range to a target three ways: by the range rings, by the cursor, and by the VRM (Variable Range Marker).

By range ring

Count the number of rings between the center of the display and the target. Check the range ring interval and judge the distance of the echo from the inner edge of the nearest ring.

By cursor

Operate the omnipad to place the cursor inter- section on the inside edge of the target echo, The range to the target, as well as the bearing, appears at the bottom of the display.

By VRM

1.Press the [EBL/VRM SELECT] key to cir- cumscribe a VRM readout (at the bottom right-hand corner). Each press of the key selects the readout of EBL1, EBL2, VRM1 or VRM2 in that order.

EBL	VRM
345.6°R	5.3°NM
23.0°R	12.5°NM

Figure 2-7 Display bottom, showing location

of EBL and VRM readouts

2.Press the [EBL/VRM CONTROL] key to enable control of the VRM by the omnipad.

3.Operate the omnipad to place the outside edge of the VRM on the inside edge of the target.

4.Check the VRM readout at the bottom right- hand corner of the display to find the range to the target.

5.To anchor the VRM, press the [EBL/VRM CONTROL] key.

To erase the VRM, press and hold down the [EBL/VRM CONTROL] key about two sec- onds.

Range

6.0 NM

Range ring 2.0 interval

Target VRM1

Cursor

VRM2

		VRM1
	VRM	range
Cursor range	4.0 NM
	4.0 NM 3.0 NM	VRM2
		range

Figure 2-8 Measuring range by the cursor,

range rings and VRM

Note: You can display the range readout of the VRM and cursor in nautical miles, statute miles or kilometers. For details see the next chapter.

8