Icom MR-1210RII Instruction Manual page 33

D Measuring the relative speed and course of a target
q Simultaneously push [ENTER]/[
[ ] to turn ON the Trail function, and then the trail
extends until it reaches to the preset trail time. (pp.
6, 21)
• The trail icon and trail interval are displayed in the upper
left of the screen.
w Push [EBL1 (VRM1)]/[
EBL1 and VRM1, and then set the VRM1 and EBL1
to a previously plotted target.
• Push [t] or [u] to rotate the Electronic Bearing Line.
• Push [p] or [q] to increase or decrease the Variable
Range Marker ring size.
e Push [ENTER]/[ ] to set the VRM1/EBL1 setting.
r Push [EBL2 (VRM2)]/[
EBL2 and VRM2, and then set the VRM2 and EBL2
to the current plotted position of the same target.
• The intersection of the EBL1 and VRM1 becomes the
center of the EBL2 and VRM2.
t The VRM2 is a measure of target movement that
can be converted into relative target speed.
• For example, when a 6 minute trail time is selected, mul-
tiplying the distance by ten gives the relative average
speed of the target.
• If your vessel is stationary during the plotting time, the
converted speed and direction become absolute.
• The converted speed unit is knots, kilometers or miles,
depending on the Distance Unit in the Initial menu.
y The EBL2 displays the course direction of the target.
D Measuring the distance and course from a waypoint
q Display a waypoint as described on page 23.
w Push [EBL1 (VRM1)]/[
EBL1 and VRM1, and then set the VRM1 and EBL1
to the waypoint.
• Push [t] or [u] to rotate the Electronic Bearing Line.
• Push [p] or [q] to increase or decrease the Variable
Range Marker ring size.
e Push [ENTER]/[ ] to set the VRM1/EBL1 setting.
r Push [EBL2 (VRM2)]/[
EBL2 and VRM2, and then set the VRM2 and EBL2
to a target point.
(Example: Set to the next waypoint.)
• The intersection of the EBL1 and VRM1 becomes the
center of the EBL2 and VRM2.
t The VRM2 displays the distance to the target from
the first waypoint.
• The distance unit can be selected as nautical miles (NM),
kilometers (km) or Sea miles (SM) in the Initial menu.
y The EBL2 readout displays the direction to the tar-
get from the first waypoint.
DISTANCE AND DIRECTION MEASUREMENTS
] and [CLEAR]/
] to display the
] to display the
VRM1
EBL1
] to display the
] to display the
EBL2
VRM2
4
EBL2
VRM2
VRM1
EBL1
28