Icom MR-1000TTM - Manual (Page 20)

■ Advanced measurements
Using both Electronic Bearing Lines (EBL) and both
Variable Range Markers (VRM), the following ad-
vanced measurements can be made:
D Measuring the distance and direction between 2 targets
q Push [Щ Ъ Ω ≈] to move the cursor on the desired
target.
w Push [EBL1 (VRM1)]/[ ] to display the
EBL1 and VRM1.
• Push [Ω ≈] to rotate the electronic bearing line.
• Push [Щ Ъ] to increase or decrease the variable range
marker ring size.
e Push [EBL2 (VRM2)]/[ ] to display the
EBL2 and VRM2.
• The intersection of the EBL1 and VRM1 becomes the
center of the EBL2 and VRM2.
r Push [Щ Ъ Ω ≈] to move the cursor on the other
target.
• Push [Ω ≈] to rotate the electronic bearing line.
• Push [Щ Ъ] to increase or decrease the variable range
marker ring size.
t The VRM2 readout shows the distance between the
two targets. The EBL2 readout shows the direction
from one target to the other.
D Measuring the relative speed and course of a target
q Push [TRAILS]/[ ] (p. 12) ON; then wait until
the trail time count up reaches to the TRAIL TIME.
w Set VRM1 and EBL1 to a previously plotted target
as described above.
e Set VRM2 and EBL2 to the current plotted position
of the same target as described as above.
r The VRM2 readout is a measure of target move-
ment which can be converted into relative target
speed.
• For example, when a 6 min. trail time is selected, multi-
plying the distance by ten gives the relative average
speed of the target.
• If your ship is stationary during the plotting time, the
converted speed and direction become absolute.
• The converted speed unit is knots or kilometers/hour
when the selected unit in the FUNCTION menu is nauti-
cal miles (NM) or kilometers (KM), respectively.
t The EBL2 readout shows the course direction of the
target.
• Measuring the distance and course from a waypoint
q Display a waypoint. (see p. 13)
w Set VRM1 and EBL1 to the displayed waypoint tar-
gets as described above.
e Set VRM2 and EBL2 to a target (e.g. the next way-
point) as described above.
r The VRM2 readout shows the distance to the target
from the waypoint.
• The distance unit can be selected as nautical miles (NM)
or kilometers (KM) in the FUNCTION menu.
t The EBL2 readout shows the direction to the target
from the waypoint.
3/4 TVECT 6M
1141NM NM CURS\
SOG KT H UP
3171˚M
HDG
IR
ES
EBL1 3211˚T
EBL2 1714˚T
WPT VRM1 0401NM
VRM2 0184NM
POSN
VRM2
EBL2
EBL1
VRM1
3/4 MTUNE TVECT 3M
1141NM NM CURS\
SOG km/h H UP
3171˚M
HDG
IR
ES
EBL1 3211˚M
EBL2 0890˚T
WPT VRM1 0852NM
VRM20814NM
POSN
ALM
GYRO
GPS
EBL2 EBL1
VRM2
VRM1
5
DISTANCE AND DIRECTION MEASUREMENTS
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