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CPV550
14.2 COMPASS
The GPS Chart Plotter computes compass direction from the constellation of GPS
Satellites. For the GPS Chart Plotter to compute direction the vessel must be moving
through the water. This menu allows the GPS Chart Plotter to customize the following
selections:
Bearings
: Selects between True and Magnetic. When Magnetic bearings is enabled, the GPS Chart Plotter applies
the selected Magnetic Variation (Auto or Manual, see next paragraph) to compute True bearing.
Variation
: Allows the user to select Auto or Manual. When Auto mode is selected the GPS Chart Plotter computes
the offset by the current GPS fixed location. Manual mode allows the user to enter in a magnetic variation
that is applied in the True conversion.
Calibration
: This function allows a user to enter in the offset for areas that the vessel may cruise instead of entering
in a manual offset for one location. This offset is useful for cruising vessels or vessels that travel
internationally often.
Figure 14.2 - Compass Table
14.3 ALARMS
This menu is used to select and setup audible and visual Alarms. Available alarms are
Arrival, XTE, Depth, Anchor and Grounding Alarm.
Arrival Alarm
: Alerts when the vessel is approaching a single destination point or when arriving at a leg in a Route.
Available selections: 0.00 to 4.99NM.
XTE Alarm
: Alerts when the vessel is deviating from a defined course. Available selections: 0.00 to 4.99NM.
Depth Alarm
: Alerts when the received depth Value from the optional FF520 50/200kHz BLACK BOX FISH
FINDER or Depth Finder inputting NMEA data into the GPS Chart Plotter is lower than the selected
value. Available selections: 0000 to 3278 FT.
Anchor Alarm
: Alerts when the ships moves off a selected locations by a selected distance. Available selections:
0.00 to 4.99NM.
Audible Alarm
: Enables or disables the alarm beep.
Grounding Alarm
: This function looks ahead of the vessels heading to see if a potential danger exists. When the
Grounding Alarm is enabled (0.0 to 66Ft) the GPS Chart Plotter will draw a triangle in front of the
vessel on the Chart page showing the area that is being searched. The depth and range (distance)
of the area the GPS Chart Plotter looks ahead for a shallow area can be set using this function.
The following warning appears when the Grounding Alarm is enabled:
NOTES
The Grounding Alarm function only operates with the new NT
+
/MAX C-CARDs. It also affects the
speed of the redraw of the screen. If this function is not used it may be disabled.
When any of the objects checked are found for the first time, the GPS Chart Plotter shows a pop
up window to alert the user of the possible danger. The name of each new dangerous object found
is reported in the warning window. In the Grounding Alarm Report page the relative item has a
tick marker next to it, to identify the dangerous object currently detected. If in the next search cycle
the same objects are found again, the alarm window will not be shown. Instead, if in the next
searches the objects found before are no longer detected, their relevant item in the Grounding
Alarm Report page is cleared (note that in this case, if the same object type is found again later,
the Alarm will be shown). The GPS Chart Plotter shows an icon on the charts that identifies when
a Grounding Alarm is detected.
a.
Ground Alarm Range
: Allows setting the distance of the grounding alarm zone.
Available selections are 0.25, 0.5 and 1.0NM. When a depth or a object is found in the
scanned zone area a marker is printed in the Grounding Alarm Report Page to identify
which dangerous objects have been currently detected.
b.
Grounding Alarm Report
: Displays a report of dangerous objects found.
