37Table of Setup Codes and Values of the ParametersNAVIGATION FUNCTION CODESDescription Code Values of the Parameters FactoryDefaultsNavigation Gain 15 1 lowest gain, 73 highest gain 50Navigation Trim Gain 16 1 lowest gain, 73 highest gain 49Code 15 & 16: Most GPS systems only send cross track error across the NMEA 0183 data bus with .01 mile (60feet) resolution. Unfortunately, they display cross track error to the nearest foot. What this means is, don’t expect theautopilot to zero the cross track error because the information it has is-that any crosstrack error less than 60 ft. (as seenon the GPS display) is zero feet. Adjust parameter 15 up until the boat oscillates back and forth near the course line,then back it down a few clicks. Increase parameter 16 until you can see that standoff from the course line decreases overtime.Use Magnetic North 17 [Up Arrow] for Mag [Down Arrow] for True Heading MAGSet North 48 In [Standby] Press and hold GPS [Select Load]- if Up ArrowLED lights, point boat north-then press and release DMUse Synthetic XTE 167 [Up Arrow] for on, [Down Arrow] for off OnCode 167: On some GPS’ this code may result in tighter tracking near waypoints.Use NMEA Checksum 347 [Up Arrow] for on, [Down Arrow] for off OnCode 347: If your GPS calculates checksums wrong, you may still be able to use it with this code turned off. Dataintegrity is compromised in this condition.Use Reversed XTE 18 [Up Arrow] for on, [Down Arrow] for off OffCode 18: Some GPS’ send the wrong direction to steer with the crosstrack error signal. Use this code to fix thisproblem.Use GPS 1 GPS 2 34 [Up Arrow] for 2, [Down Arrow] for 1 1Code 34: This code switches between the two sources of NMEA navigation data used by the autopilot to steer with.Update rate for HDG out 49 0 (off) to 10 HZ Update Rate 10 HZCode 49: With this code at the bottom of its range (Down Arrow LED on) the autopilot does not transmit $APHDG. Withany settings other than off, the data is transmitted at a rate equal to (1-code 49 setting) HZ. up to a maximum rate of 10 Hz.Fine Heading Adjust 168 [Up Arrow] increase heading out .1 deg. [Down Arrow] decreasesheading out .1 deg. Note: Very Slow response to buttons.Description Code Values of the Parameters FactoryDefaultsStep Turns (Degrees per Step 6 10 Choices/ 1.2.3.4.5.10.15.30,45,90 Degrees 15Circle Time 7 10 Choices/ 1.2.3.4.5.10.15.30,45,90 Minutes 5Zig-Zag Amplitude (Degree of Turn) 8 10 Choices/5 to 50 degrees by 5’s 30Zig-Zag Period (Length) 9 20 Choices 1/2 to 10 minutes by 1/2’s 1.5MOB Overshoot 14 1 Most overshoot command. 40 most undershoot 10Clover Leaf Length 28 500 to 6,000ft by 100ft increments 1,000Search Spacing 25 50 to 1,000ft by 50 ft increments 50