Simrad Maris ECDIS900 - Ship; Ship Overview

Ship Overview
Ship
SHIP OVERVIEW
P
OSITIONING MODE
The ECDIS receives the position information from the GPS and course and speed data from
gyro/log sensor. In case of sensor failure the ECDIS switches automatically to the
Dead reckoning
or the simulation mode. The
Predi ctor module
calculates and displays the future position of the
ships
SHIP PROPERTIES
The
Ship properti es
dialogue allows customizing the display of the
ship's icon
and setting
different parameters.
GPS AND DATUM
The GPS (or dGPS) installed on board ship sends information about ship’s position to the
ECDIS.
IMPORTANT
GPS sensors send the positions calculated with a datum selected by the user.
• When the GPS sends the NMEA message DTM including information about the
datum used by the GPS, ECDIS converts automatically the GPS positions to the
datum used in the current chart.
• When the GPS does not send datum information ECDIS assumes that the GPS uses
the WGS84 Datum and converts the ship’s position to the datum used in the chart.
S-57 charts are displayed in a Datum / Projection selected by the operator and ECDIS ensures
the consistency between the datum used by the chart and the position system within the
limits described above. To modify the datum or the projection of the S-57 chart, see chapter
S57.
ARCS charts are displayed in the Datum / Projection of the paper source charts and ECDIS
automatically converts the ship’s position to the current Datum / Projection.
POSITION OFFSETS
The position of the ship is monitored in the ship’s position panel.
To adjust the position manually, click right button in the panel and activate the appropriate
menu and enter the latitude and longitude shifting (Negative values for South and West).
When offsets are entered, the ship’s position panel is displayed in yellow and the latitude
and longitude offsets are clearly indicated.
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