Gps Sog/Cog Filter; Compass Set Up; Language; Simulator - Raymarine DSM250 Owner's Handbook Manual

4-12

GPS SOG/COG Filter

Compass Set Up

Language

Simulator

The SOG/COG filter averages the velocity vectors to compensate
for the oscillating motion of the vessel, giving a clearer indication
of the vessel's course and speed. The filter does not affect the cal-
culation of the GPS position. The velocity vectors calculated from
the GPS Signal give an instantaneous measure of speed and direc-
tion of the GPS antenna. The COG and SOG can therefore seem
erratic under certain conditions. For example, when a vessel is
moving slowly through rough seas, the antenna moves from side
to side as well as in the direction of the vessel.
Slow moving vessels, or vessels sailing in rough seas will benefit
from a high setting, whereas a power boat that can quickly change
speed and direction will benefit from a low setting.
Select the SOG/COG filter setting as required. This can be set to
HIGH, MEDIUM or LOW.
This option is used to calibrate a Raymarine heading sensor such
as the Pathfinder Smart Heading System. Controls are provided
for LINEARISE COMPASS, which detects and corrects for heading
errors caused by metal objects, and ALIGN HEADING, which
matches the displayed heading to a known heading or transit.
Refer to the Handbook supplied with your heading sensor for
more details.
Select the language in which you wish information to be dis-
played. The selected language will be used for screen text, labels,
menus, and options, but will not affect the letters displayed by the
context-sensitive cursor. The language setting also affects the dis-
play format for lat/long position information.
The simulator enables you to operate your display without data
from the transducer and/or external data sources. The system set
up simulator options have the following functions:
• Data provides simulated numerical data, and a waypoint display.
DSM250 Digital Sounder Module