Trail Function - Icom MR-1220 Series Instruction Manual

Trail function

The trail function memorizes echoes continuously at
constant intervals. This function is useful for watching
other vessels' tracks, approximate relative speed, and
so on.
D Displaying the Trail
1. Push [TRAILS]/[
function.
• The trail indicator and trail interval are displayed in
the upper left of the screen.
• Trail interval counter starts to count up to the trail
time.
Trail reference Trail interval counter
Trail time
All echoes higher than the specified level at the
plotted time are memorized and displayed with
a graduated intensity together with the current
echoes.
• Echoes are displayed with minimum intensity when
"Continuous" is selected.
[TRAILS]/[
L Hold down
reset the plotted echoes.
2. Push [TRAILS]/[
function and erase the plotted echoes.
• The trail indicator and the trail interval disappear.
] to turn ON the Trail
Trail
]
for 1 second to
] to cancel the Trail
D Customizing the trail settings
You can customize the trail settings in the Trail menu.
[MENU]/[ ] > Trail
Clear Trails
L Settable only when the Trail function is ON.
z Resets the current trails.
Push [◄] to select <OK>, and then push [ENTER]/
[ ] to reset the trails.
Reference Settings
Selects the reference of the trails.
• True:
The trails of other vessels show the real
speeds and courses over the ground,
regardless of your vessel movement.
The Heading signal (HDG) and the
position (GPS) data of your vessel are
required.
• Relative: The trails of other vessels show relative
movement to your vessel. This setting is
useful to avoid a collision. However, it is
not recommended to use it near islands
because a stopped target (for example,
an island) is also displayed with a trail.
L Regardless of this setting, the True trail is displayed when
the True motion (TM) mode is selected.
Time
Selects the trail time from 30 sec, 1 min, 3 min, 6 min,
15 min, 30 min, or Continuous.
Level
Selects the trail strength from Low, Middle, or High.
Fine Trail
The Fine Trail function makes the trails thin to show
the movement of the target clearer. Select the trail
type from OFF (normal), 1 (fine), or 2 (extra fine).
Color
Selects the trail color from Blue, Yellow, Green, Red,
Orange, or White.
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