Koden MDC-2900, Operation Manual

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Chapter 3 Primary operations (Menu) MDC-2900 Series
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Relative display (R)
The target trail is displayed as result of sum of vector (course and speed) of the target ship and your
ship. When your ship is on the projected course of this trail, it shows that a collision may occur in future.
This display is useful to help detect a dangerous situation.
N N
<
Display mode
[
N UP
RM
] >
Target 1
Course and speed of a real ship Ships relative trails
Target 2
Two ships on a
collision course
Antenna
position
TRAIL
REL TRAIL
REL
Target 1, whose trail is overlapping the EBL, is a dangerous target while the Target 2 is not. If trail
setting is six minutes, and if the trail length is equal to the distance between the antenna position and
Target 1, then the collision will occur after six minutes.
N
<
Display mode
[
N UP
RM
] >
Target 1
6min
6min
Prospect of collision after 6min
Antenna
position
TRAIL
REL
True display (T)
This mode displays the trail of the moving target over a specified time interval independently from own
ship's movement.
This mode is used to monitor the bearing and speed of the target.
No trails of fixed targets such as land are drawn on the display.
The amount of movement of all ships, own ship, Target 1 and Target 2 are drawn as trails.
The land does not move, so its trail is not drawn.
N N
<
Display mode
[
N UP
RM
] >
Target 1
Course and speed of a real ship Trail after the time has passed
Target 2
Time passes
Land
Antenna
position
TRAIL
T TRAIL
T