Si-tex SP38, Installation And Operation Manual, Page: 32 / 193

Sitex SP38 Installation and Operation System Overview
Document PN 29010101 V1r0
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One feature that is especially useful in marine applications, is that Heading is determined
by mathematical computation, directly from the RF signals from GPS satellites, rather
than sensing the Earth’s magnetic field – and thus there are no local magnetic deviation
effects from metal objects, electrical devices, wiring, etc. As well, Heading is available at
high Latitudes.
The GNSS compass contains a solid-state Gyro sensor, which is used to provide short-
term Heading data in situations where GPS signal reception is subject to transient
interference and/or blockage. The GNSS also measures the boat’s pitch (or roll,
depending on which way the unit is mounted), and the data is available for use by other
equipment on board.
The GNSS NMEA0183 model is connected to the SP38 Autopilot at one of the SPU’s two
NMEA Input ports. The standard cable lengths are 15 metres (50’) or 30 metres (100’);
custom lengths are also available.
The GNSS NMEA2000 model is connected to the NMEA2000 network via a 6m
NMEA2000 cable.
Navigator G2 GPS Compasses Display
PN 20130003 (monochrome) or 20130004 (colour)
PN 10130056 (system with G2 and15 or 30 m cable, monochrome)
PN 10130051 or 10130053 (system with G2 and15 or 30 m cable, colour)
The Sitex Navigator G2 GPS Compass Display is an optional control and status display
unit for the NMEA0183 model of G2 and/or G2B GNSS Compass.
The Navigator G2 option consists of a Display Head seen in Figure 7 , that is identical in
shape, size and overall appearance to the SP38’s Control Head, and a Distribution Unit
that provides a convenient way to connect the GNSS G2/G2B compass (NMEA0183
model) to the SP38 and to power. The Display Head is available with a monochrome or
colour LCD display; it uses the same mounting methods and cover, as the Sitex SP38
Control Head.
The Display Head provides graphical and textual information about the boat’s position,
heading, speed and turn rate. The Head also can display several menus, which are used
to control the configuration and operation of the G2/G2B. Up to two Heads can be used
at once.
Figure 7 – Navigator G2 Display Head