Icom MR-1220 Instruction Manual - Page 22

DISTANCE AND DIRECTION MEASUREMENTS, Distance measurement

Get Icom MR-1220 PDF manuals and user guides View all Icom MR-1220 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 22 highlights

3 DISTANCE AND DIRECTION MEASUREMENTS Distance measurement Various way to measure the distance are provided with this radar. LLYou 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. p. 18 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. p. 19 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. p. 20 DDUsing 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. Ring interval Fixed range rings 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 Range (NM) Ring interval Type 1 Type 2 Number of rings Type 1 Type 2 Range (km) Ring interval Type 1 Type 2 Number of rings Type 1 Type 2 1/8 0.0625 2 1/4 0.125 2 1/2 0.125 4 3/4 0.25 3 1/4 0.125 1/2 0.125 0.25 3/4 0.25 1 0.25 2 42 3 4 1 0.25 4 1.5 0.5 0.25 3 6 1.5 0.5 0.25 3 6 2 0.5 4 2 0.5 4 3 1 0.5 3 6 3 1 0.5 3 6 4 1 4 4 1 4 62136 6 2 1 36 8 2 4 8 2 4 12 3 4 12 3 2 4 6 16 4 4 16 4 4 24 6 4 24 6 4 4 6 32 8 4 32 8 4 36 12 3 36 12 48*1 12 64*1 16 72*2 18 3 48 12 4 4 64*1 16 4 4 72*1 18 4 4 96*2 24 4 *1 Only for the MR-1220T6 and MR-1220T6L. *2 Only for the MR-1220T6L. LLThe number of rings may differ, when the screen is shifted by a function such as Off Center. LLin 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. 17

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
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.
p. 18
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.
p. 19
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.
p. 20
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