PRODUCT DESCRIPTION
SI-TEX SP-70 or SP-80 Autopilots are
reliable, accurate and easy to use aids to
navigation. They feature four operating
modes, watertight design, and built-in
navigation interface.
The 4 operating modes are:
• STANDBY MODE allows manual steering
while displaying compass information.
• POWER STEERING MODE features
push button steering control, and displays
compass or rudder information.
• PILOT MODE steers to a constant
heading.
• NAV MODE steers along a course line
when the SP-70 or SP-80 is connected to
an appropriate navigation device.
In both PILOT and NAV Mode, pressing the
Red or Green Key allows use of the
Dodge/Course-change feature.
To s
teer a constant heading, the SP-70 or
SP-80 compares compass heading
information with the course heading that is
entered into memory. If the vessel is not on
the correct heading, the Autopilot calculates
the rudder position that will bring the vessel
onto the correct heading. The Autopilot uses
a drive unit to move the rudder. Information
from the Rotary Feedback or Outboard
Feedback is used to calculate new rudder
positions and to verify that the steering
system has followed the Autopilot
commands.
When steering along a course line, both
Autopilots use information from the compass
to monitor the heading. They also use
position information received in NMEA 0183
format from LORAN, GPS, or plotter. Using
both of these inputs, the SP-70/SP-80
calculates a course to steer and keeps the
vessel on the course line.
The SP-70/SP-80 contains a program called
Ghost Rudder. Should the Rudder Feedback
fail, the Autopilot will use its memory of the
rudder movement to calculate new rudder
positions. The Ghost Rudder program will not
allow the Autopilot to steer as well as it can
with the Rudder Feedback. It will allow the
Autopilot to be used until repairs can be
made to the Rudder Feedback.
The design of the SP-70/SP-80 includes
many circuit protection devices such as;
reverse power connection protection, output
circuitry overload protection, protection
against overheating, protection against
computer failure or program error.
SPECIFICATIONS
Voltage: 10VDC - 40 VDC
Steering Outputs: 20 Amperes Maximum
Sizes L X W X H
SP-70 Control: 2.75 x 5.13 x 1.0 in.
(7.0 x 13.3 x 2.5 cm.)
SP-80 Control: 6.0 x 3.1 x 1.0 in
(15.4 x 7.9 x 2.5 cm)
Processor: 6.3 X 15 X 2.7 in.
(16.0 x 38.1 x 6.9 cm.)
Compass: 5.6 x 4.2 x 3.4 in.
(14.2 x 10.7 x 7.6 cm)
Pump: 4.8 x 7.5 x 4 in.
(12.2 x 19.0 x 10.2
cm.)
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