74 DSM300 Operation with PLUS Series Displays
Note:
To obtain MOB position, you need either of the following:
• Position data from a GPS or equivalent device
• Heading and speed data, so that the position can be calculated by dead reck-
oning
➤ To initiate the MOB procedure, press and hold the MARKS key for two
seconds. The system then performs the following tasks automatically:
• Marks the Sonar image with a vertical line and the letters MOB.
• Marks the current position on the chart display with a MOB symbol .
• Displays the MOB data box, showing the bearing and distance from your boat
to the MOB waypoint position and the elapsed time since the MOB was initi-
ated (Figure 5-1 ).
• Sounds a 4-second alarm pattern every 30 seconds.
• Sends an MOB message (including bearing and distance) to other units in the
system, via the SeaTalk connection.
Figure 5-1: MOB Display
➤ To cancel the MOB, press and hold the MARKS key for 2 seconds.
The MOB symbol and data box are removed.
Note:
The MOB procedure can also be initiated or cancelled if the appropriate SeaTalk
message is received by the display unit.
MARKS
D6188-1
MOB
position
MOB
data box
ZOOMFREQUENCY
BTM.LOCK A-SCOPE
MOB
100
RNG
0.33
nm
BRG
162
°
T
00:05:24
MOB
POSITION
N 43°04^76
W070°44^83
80
60
MARKS
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