Advanced Settings; Navigate Menu; Loran Td - Standard Horizon CPN1010i Owner's Manual

ADVANCED SETTINGS

The Advanced Setup menu allows customization of many GPS functions, Alarms and
NMEA interfacing.
1. Press the
2. Tap on ADVANCED. While in this menu you will see many selections which are
described in the next sections.

NAVIGATE MENU

The Navigate menu allows customization of the Coordinate System (Loran TD's), Chart
Datum, Chart Orientation Resolution (angle the vessel has to change before the chart is
redrawn) and Static Navigation. See the following table:
COORDINATE SYSTEM:
CHART DATUM:
CHART ORIENTATION RES:
STATIC NAVIGATION:

Loran TD

The Loran TD selection allows the CPN Series Chart Plotter to be set up so the user can
enter in LORAN TD's directly into the CPN Series Chart Plotter. After the TD's have been
entered, and the user changes to ddd mm.sss (Degrees Minutes and Seconds) the TD's
will be converted to Lat / Lon coordinates. To use the TD Coordinate System the user must
setup the Chain and Pair information of the TD's. If you do not know this information, refer
to paper charts that show the Chain and Pair information. See the following table:
CHAIN:
PAIR:
ASF1/2:
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key, tap on Setup Menu.
Selections are:
a. TD: Time Difference, based on Loran
b. UTM: Universal Transverse Mercator Grid
c. ddd mm.mmm: Degrees Minutes and Thousands of Minutes
d. ddd mm.mm: Degrees Minutes and Hundredths of Minutes
e. ddd mm.ss: Degrees Minutes and Seconds
Allows selection of Chart Datums. The default Datum is WGS 1984 as C-MAP
J cartography has been compiled using the WGS84 Datum. A datum is a
EPPESEN
mathematical model of the earth which approximates the shape of the earth, and
enables calculations such as position and area to be carried out in a consistent and
accurate manner.
Sets the angle the vessel has to change before the chart is redrawn. The default setting
is 30 degrees. Example: if the vessel is heading 000T at a speed of 25 Knots, the display
will redraw:
a. In Home Mode the CPN Series Chart Plotter centers the location of the vessel in
the center of the display while it is displayed in the center or on the bottom of the
screen (depending on the setting). To keep the vessel in the center of the display
the CPN Series Chart Plotter will occasionally redraw.
b. If the vessel changes course greater than 330T or more than 30T the chart will be
redrawn.
Sets up a threshold for the speed. When the speed received from the GPS is under the
selected value, the CPN Series Chart Plotter displays zero.
Selects the Chain.
Selects the Pair.
Additional Secondary phase Factor
Correction to TD1/2 values which can be inserted by the user to take in account the
additional signal propagation delay aver a mixed land/seawater path compared to on all-
seawater path. Normally the user does not enter a ASF value. However for experienced
users this function allows entering of signal delay values to fine adjust the calculated
position. The user should enter delay values to fine adjust the position calculated.
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Owner's Manual