17
Distance measurement
3
DISTANCE AND DIRECTION MEASUREMENTS
Various way to measure the distance are provided with this radar.
L
You can set the distance unit to nautical miles (NM), kilometers (km), or statute miles (SM) in the Initial Menu screen (p. 42).
TYPE DESCRIPTION
Description
Reference
Fixed range rings
(RING)
Displays concentric fixed circles around your vessel.
Suitable for rough estimations from your own vessel to any target.
You can select from two types of range rings.
See
below
Parallel index lines
(PI)
Displays six parallel index lines.
Suitable for rough estimations from your own vessel to any target.
Variable range marker 1
(VRM 1)
Displays a variable range marker and activated by [▲] or [▼] for the range
marker selector.
Suitable for accurate measurements from your own vessel to a target.
Variable range marker 2
(VRM 2)
Normally functions the same as VRM 1. When the VRM 1 and EBL 1 selects
a target, the center of VRM 2 is displayed at the intersection point.
Suitable for accurate measurements from target to target.
D
Using the Fixed range rings
The interval of the fixed range rings is displayed in
the upper left corner of the screen. The ring interval in
each screen range is listed to the right.
TIP:
You can adjust the brilliance of the range rings
in the “Ring” setting of the Brilliance & Color menu.
[MENU]/[
] > Brilliance & Color >
Brilliance of
Rings
Set the “Brilliance of Rings” setting to “OFF” to hide
the fixed range rings.
Range rings in each screen range
*1 Only for the MR-1220T6 and MR-1220T6L.
*2 Only for the MR-1220T6L.
L
The number of rings may differ, when the screen is shifted
by a function such as Off Center.
L
in the SM range, the Type 1 and 2 displays the same
rings.
Selecting the range ring type
You can select from two types of range rings.
1. Open the “Range Ring Select” setting in the Menu
screen.
[MENU]/[
] > Initial >
Range Ring Select
2. Select the type of the fixed range rings, Type 1 or
Type 2.
Ring interval
Fixed range
rings
Range
(NM)
Ring
interval
Number of
rings
Type 1 Type 2 Type 1 Type 2
1
/
8
0.0625
2
1
/
4
0.125
2
1
/
2
0.125
4
3
/
4
0.25
3
1
0.25
4
1.5
0.5
0.25
3
6
2
0.5
4
3
1
0.5
3
6
4
1
4
6
2
1
3
6
8
2
4
12
3
2
4
6
16
4
4
24
6
4
4
6
32
8
4
36
12
3
48*
1
12
4
64*
1
16
4
72*
2
18
4
Range
(km)
Ring
interval
Number of
rings
Type 1 Type 2 Type 1 Type 2
1
/
4
0.125
2
1
/
2
0.125 0.25
4
2
3
/
4
0.25
3
1
0.25
4
1.5
0.5 0.25
3
6
2
0.5
4
3
1
0.5
3
6
4
1
4
6
2
1
3
6
8
2
4
12
3
4
16
4
4
24
6
4
32
8
4
36
12
3
48
12
4
64*
1
16
4
72*
1
18
4
96*
2
24
4
Содержание MR-1220 Series
Страница 1: ...INSTRUCTION MANUAL MARINE RADAR MR 1220 series ...
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Страница 80: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan A7521H 1EX Printed in Japan 2019 Icom Inc Oct 2019 ...
