CPT CPT Operation Manual - Page 5

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1. Overview of Operation:

The rudder control and deadband control must be set properly for the CPT to hold heading.

Tack angles are approximate and will vary from boat to boat based on the magnetic environment

and deadband setting, you will have to see which angle works best for your boat.

A. Setting rudder and deadband controls:

The Rudder dial should be set high enough so that when the boat falls off it is brought back to

heading with just one or two "pulses" or wheel corrections. If the pilot makes repeated pulses or

wheel corrections in one direction the rudder control is set too low; the setting needs to be raised.

If the pilot oversteers, lower the setting a bit. High rudder settings provide larger rudder

corrections, low rudder settings provide smaller rudder corrections.

Start with the Deadband dial (dead range) set to minimum, especially when first using the pilot.

If the pilot is making port and starboard corrections too frequently, or reacting to swell,

gradually raise the deadband setting so that corrections are made when needed but are not

constant. Low deadband settings provides more sensitivity to heading changes, high deadband

settings provide less sensitivity when in swells and seas. A deadband of 5 allows the boat to range

approximately ±10° to port or starboard.

The CPT's performance can be improved by careful tuning but continously adjusting the controls is not

necessary. Once you find the rudder and deadband settings that work best for your boat, you'll use the

same settings most of the time. You can put a small tape marker on the settings to help remember them.

B. CPT Magnetic Headings:

The CPT keeps a vessel pointing to a magnetic heading; this is not the

same as a GPS course. In keeping to a compass heading, your vessel

will point the same direction but still be subject to drift from wind and

currents. This drift will be apparent when observing your GPS over

time, and periodic heading adjustments will easily keep the vessel on

your waypoint course.

A. AUTOPILOT STEERING:

1. Disengage Clutch, flip to Standby. Power ON, allow 1 minute warm-up.

2. Hold boat on heading 30 seconds. Engage Clutch. Flip toggle switch to

Hold Heading.

3. Set Rudder and Deadband controls

B. HAND STEERING:

1. Flip toggle switch to Standby.

2. Relieve pressure from wheel and disegage clutch (grasp the black disk of the clutch and pull outward ¼")

www.cptautopilot.com

OPERATION

Page 4 of 17

Waypoint

GPS

Course

Compass

Course

Direction of current

Waypoint