Koden MDC-5004, Operation Manuals

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MDC-5000 Series Chapter 2 Radar Basic Operation
0093153004-00 2-31
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.
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.
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 shown using this 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 shown.
Target 1
Course and speed of a real ship Trail after the time has passed
Target 2
Time passes
Land
Own ship
position
<
Display mode [N UP
RM
]
>
N N
TRAIL
T 6min
TRAIL
T 6min
Prospect of collision after 6min
6min
6min
N
<
Display mode [N UP
RM
]
>
Target 1
Own ship
position
TRAIL
R 6min
Target 1
Course and speed of a real ship Ships relative trails
Target 2
Two ships on a
collision course
Own Ship
position
N
TRAIL
R 6min
<
Display mode [N UP
RM
]
>
TRAIL
R 6min
N