Mobile Crossing WayPoint Map Loader Manual del operador descargar pdf (Pagina 69)

SeaMarks manual VI. Menu Reference •

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Function: DB-9 pin

Data: 3

Ground: 5

The pin connections for the GPS end of the cable can generally be found in the manual for that equipment.

Once communications is established with your GPS, you will see the NMEA sentence traffic in the

COMMUNICATIONS TEST window within the TRACK PLOTTING window. The sentences that start with either

$LCGLL, $GPGLL, $LCRMC, or $GPRMC will be the ones used for plotting. The GPS usually outputs these sentences

once per second. You may need to set your GPS into the right mode to output the NMEA-183 sentences. Check its

manual for how to do this. If your GPS gives you a choice of NMEA 183-1.5 or 2.0, use the 2.0 as this will give you

more digits of precision.

Operation

You can choose to plot points at intervals of 1 second to 300 seconds or at distance intervals of 60 feet to 10 miles. In

the latter mode, a new position is plotted only if you get more than this distance from the last point plotted. The track

plot length (memory) can be set from 10 to 30000 points and letting it wrap around when filled can reuse the track

memory. While the track is being plotted, the Lat/Lon and the width of the display in miles are displayed on the top of

the screen. If the GPS has not found or loses the signals and has no data, this display area will say "no Lat/Lon

available".

The track style can be a series of dots, dots with a line connecting the dots, a line only, or no track, just the present

position symbol.

You can select FOLLOW BOAT where a symbol representing the boat's position is centered in the graphic screen. The

screen is re-centered on your present position if the track gets more than 10% away from the center. If you want to view

some other area, turn off following, then pan and zoom as needed. All normal graphics features are available while

plotting. You will normally want to zoom in from the original display setting to show the track in more detail.

You can revisit the TRACK PLOTTING control panel while plotting without disturbing the plotting process. Certain

operations, however, will interrupt plotting momentarily. The file opening dialog box, for example, will divert the

computers' attention from plotting. Screen savers can also suspend program operation and thus plotting. There may be

up to 3 seconds of delay in resuming plotting if it is interrupted. To erase the present plot and begin anew, push START

NEW PLOT.

While in the track plotting mode, the IDENTIFY WAYPOINT function will not only identify any waypoint on the

screen, it will also calculate your range and bearing to it. The program will find the nearest waypoint to the spot you

clicked on and give you the range and bearing from your present position to it.

You can save the track to a file if desired. It will be put into a track file (*.DBT) that can be later examined, edited, or

presented as points or as a track. To display a saved track, select TRACKS from the CHART OPERATIONS menu.

You can save the present boat position by pushing the SAVE THIS SPOT button on the TRACK PLOTTING Control

Panel. This will show the ADDING WAYPOINTS dialog and allow you to name the spot and give more details if

desired. This waypoint is then added to the file being displayed. Push OK, DONE to finish to return to plotting.

5.14 Charting Options

Sets some optional parameters for Charts and MAPs. It allows you to specify how points are displayed, the font size, the

Loran or Lat/Lon line presence and spacing and a choice of range and bearing lines. Changing chart settings may change

the corresponding MAP settings. That is, Charting options and Mapping options are somewhat linked.

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