420 Autopilot System Installation & Operation Manual COMPLIES WITH CE REGULATIONS PN 29010012 V1.
1420 Autopilot System Installation & Operation Manual Document PN 29010012 V1.
First Printing: January 1993 Revised: June 2000 Revised: January/February/June 2009 Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System WELCOME Congratulations on your purchase of a ComNav Marine 1420 Autopilot System Autopilot System! At ComNav, we are dedicated to reliability & quality in all our products, and proud of our prominence as a leader in the design and manufacture of marine autopilot systems. We promise to do our best to ensure your satisfaction with your new Autopilot System. ComNav Marine Ltd.
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ComNav Marine 1420 Autopilot System TABLE OF CONTENTS Product Description....................................................................................................................5 Before You Start..........................................................................................................................6 Unpacking and Identification......................................................................................................................... 6 Manual Conventions .........
ComNav Marine 1420 Autopilot System Piloting with the 1420 Autopilot System.................................................................................45 Steering Control Settings ............................................................................................................................ 45 Turning ON the Autopilot:................................................................................................................... 45 Turning the Autopilot OFF ............................
ComNav Marine 1420 Autopilot System Product Description The ComNav 1420 Autopilot System has been designed to make the advantages of a marine autopilot available to a wide range of vessels which need accurate steering control, yet have only limited space, and require easy installation and operation. The 1420 Autopilot contains a feature called Ghost Rudder. Should the Rudder Feedback ever fail, the Autopilot will use its prior knowledge of how the rudder moves to calculate new “virtual rudder” positions.
ComNav Marine 1420 Autopilot System Before You Start Manual Conventions Thank you for buying the ComNav 1420 Autopilot System. It will make boating safer, easier and more enjoyable for you! In this manual, the names of the main components are capitalized. Please do not forget to complete and send in your warranty card. For example: Processor Also, the keys on the Control Head are capitalized. This will give you 3 years of Warranty protection.
ComNav Marine 1420 Autopilot System Tools Required The general tools & other items you will need while installing the system are: 1) Basic Tool Kit 2) Screwdrivers: slot-head 3) Wire Cutters: a pair of ordinary wire cutters suitable for general electrical work will do 4) Drill and a selection of Drill Bits 5) Small Adjustable Wrench 6) Any tools specific to your boat 7) Miscellaneous fasteners & mounting hardware, for mounting components and securing hydraulic lines (see individual “installati
ComNav Marine 1420 Autopilot System 1420 System Diagram Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System Parts List Note: Parts are not drawn to any scale. Processor. PN 20070003 Control Head. PN 20070002. This part includes 25 feet (7.6 m) of cable wired to it. Control Head Mounting Clip and Spacer (these are included in the Accessory Kit). PNs 65610066 & 65610067 (can also be ordered together as PN 30070002, if additional Head mounting locations are desired). Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System ComNav Fluxgate Compass. PN 20320003. This has 40 feet (12.2 m) of cable wired to it; the other end of the cable has stripped & tinned wires. If you purchased a system with a Heading Rate Stabilizer, you will instead have a Fluxgate Compass PN 20320004, which has a 7-pin plug on the cable’s end. The Compass plugs into the HRS. The HRS is PN 20320009, and has 40 feet (12.2 m) of cable wired to it; the other end of the cable has stripped & tinned wires.
ComNav Marine 1420 Autopilot System Also included but not shown: • Power Cable. 7.5 feet (2.3 m) of cable (labelled “5”), for connecting supply voltage to the Processor. • Accessory Kit. PN 20070004. Contains extra terminal sockets, a cable gland and the Control Head Mounting Clip & Spacer. • 1420 Installation & Operation Manual (this manual, PN 29010012). If you purchased a system with a ComNav hydraulic pump, one of two models, at one of two operating voltage ratings, will be included.
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ComNav Marine 1420 Autopilot System Installation Instructions Caution Using ordinary electric tools near water is VERY dangerous! To minimize the dangers of electric shock and personal injury, we recommend using only cordless rechargeable tools, and/ or hand tools, during the installation of the system. 1420 Autopilot System Allow at least a foot (30 cm) of clearance on either end of the Processor in the space where it is to be located.
ComNav Marine 1420 Autopilot System Power Connection Grounding There is 7.5 feet (2.3 m) of power cable included with your Autopilot System. We recommend that you do not lengthen this cable. The Power Cable also contains a grounding wire. Connecting this wire to a good ground (see * below) may reduce static on radios and improve GPS reception.
ComNav Marine 1420 Autopilot System Fluxgate Compass Installation Installing the Mounting Clip And Spacer Fluxgate Compass The fluxgate compass must be correctly positioned or it will not work. To correctly position the Fluxgate Compass, mount it so that the top surface (with the cable gland) is up. Head Mounting Clip and Spacer The Mounting Clip is used for mounting the Control Head. The design of the Clip allows two methods of placing the Control Head cable.
ComNav Marine 1420 Autopilot System Rotary Rudder Feedback Installation If you have a 1420 Autopilot System with an Outboard Feedback, please go to page 19.
ComNav Marine 1420 Autopilot System Mounting the Rudder Feedback In the diagram above notice that: • the Rudder Feedback Arm is above the cable entry gland • the Linkage sockets are on the top of the ball joints. Do not mount the ball joints on the underside of the Arms, so that the Linkage would “hang” from the ball joints. To align the Rudder Feedback Arm & the Rudder Post Arm correctly, you may need to make a mounting base for the Rudder Feedback. Such a base must be firm.
ComNav Marine 1420 Autopilot System Assembling the Rudder Feedback Arm: Loosen the adjustment block that keeps the two pieces of the Rudder Feedback Linkage from sliding. Measure the approximate diameter of your rudder post in inches. The Rudder Post Arm has several holes drilled through it. The holes are marked by numbers on the top surface of the arm. Snap the Rudder Feedback Linkage onto the two Brass Balls. Make sure to close the small release clamps on each Plastic Socket.
ComNav Marine 1420 Autopilot System Outboard Feedback Installation If you have a Rotary Rudder Feedback, please go to page 16. Introduction The Outboard Feedback sends information about the rudder or propeller position to the 1420 Autopilot. The Outboard Feedback is provided with 30 feet (9.1 m) of cable. The Outboard Feedback can be used with hydraulic cylinders from 1.25 to 2.25” (3.18 to 5.71 cm) in diameter. The cylinder stroke cannot exceed 10” (25.4 cm).
ComNav Marine 1420 Autopilot System Mounting Hardware Mount the Outboard Feedback so that it will not be damaged when the motor is tilted for trailering. Mounting Use a tape measure or ruler to position the Outboard Feedback rod so that it projects 5.25” (13.3 cm) from the body of the Outboard Feedback. The Outboard Feedback may be mounted with the sliding rod facing either left or right. Before you install the Feedback, move the steering gear through its full range of motion from one side to the other.
ComNav Marine 1420 Autopilot System Adjust the position of the Outboard Feedback so that the end of the sliding rod is flush with the Stainless Bracket. Screw the nut onto the threaded rod at the end of the Outboard Feedback. Adjust the position of the Outboard Feedback so that as nearly as possible it is parallel with the hydraulic cylinder both horizontally and vertically. Tighten the nuts and the stainless steel band clamp securely. Run the cable forward to the 1420 Processor location.
ComNav Marine 1420 Autopilot System Outboard Feedback Mounting to Front Mount Cylinder Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System Rudder Drive The next step is to install the Rudder Drive. • If the system you purchased includes a Reversing-Motor Hydraulic Pump, follow the instructions in this section. • If your system came with a Cable Drive, follow the Installation Instructions that came with that. • If your system did not come with a Drive System, you will have to adapt the Autopilot’s Drive outputs to your vessel’s existing Steering System.
ComNav Marine 1420 Autopilot System Pump Models & Specifications There are two models of ComNav pumps, defined by the maximum size of cylinder they can be used with: 18 in3 or 30 in3. Each model also has a choice for the operating voltage of the pump’s motor: 12 or 24 VDC. 1. Model 18CI pumps are suitable for cylinders from 7 in3 to 18 in3 (115 cm3 to 295 cm3) in displacement 2.
ComNav Marine 1420 Autopilot System Types of Steering Systems There are two general types of steering systems: Two Line systems, and Three Line systems. The pump connection to the steering system is different for each type. There are separate instructions below for each type (see pages 28 & 29). If you are installing this pump on a Capilano or Syten steering system, you probably have a Three Line steering system.
ComNav Marine 1420 Autopilot System Notes & Cautions Before beginning to connect the pump to the steering system, review the following points: • • Cap or cover the ends of hoses with a clean rag before pushing them between bulkheads. Wipe copper filings off freshly cut and reamed copper tube. Do not blow the filings off.
ComNav Marine 1420 Autopilot System Installing the Pump Installation of the pump consists of: • Finding a mounting location for the pump • Partially draining the steering system • Mounting and connecting the pump to the existing steering lines • Filling and bleeding the steering system A suitable mounting location for the pump MUST: • Be dry • Be lower than at least one of the helm pumps in the steering system • Provide a solid mounting base • Be at least 4 feet (3.
ComNav Marine 1420 Autopilot System Hydraulic Connections Next, make the appropriate hydraulic connections, according to whether you have a Two Line or Three Line Steering System. Hydraulic Connections for Two Line Steering Systems 2 Line Steering System Connections Delivery Lines: Ports A and B in the diagram above are the input/output ports of the pump and must be connected to the steering lines coming from the steering cylinder. It does not matter which pump port is connected to which steering line.
ComNav Marine 1420 Autopilot System Hydraulic Connections for Three Line Steering Systems 3 Line Steering System Connections Delivery Lines: In the above diagram, Ports A and B are the input/output ports of the pump, and must be connected to the steering lines between the steering cylinder and the Uniflow valve. The simplest method of doing this is to install a tee in each of the cylinder ports of the Uniflow valve itself, and connect to these tees.
ComNav Marine 1420 Autopilot System Fill And Bleed After you have installed your Pump, fill it with hydraulic fluid, and then bleed it. The first part if this procedure can be done right away – but for the rest, the Autopilot must be installed and powered up, so you will be referred back here during Autopilot Setup. 1. Bleed your manual steering system according to the manufacturer's instructions.
ComNav Marine 1420 Autopilot System Bleeding cylinder, rod moving left Bleeding cylinder, rod moving right. Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System 8. Refill your steering system from the highest reservoir. 13. Close all bleeding screws or nipples. Clean up any oil spills and wipe fittings clean. Remove any buckets or equipment a short distance from the cylinders and fittings. 9. Adjust the bleeding screws so that the cylinder will be bled when the rod is extended in the original direction. Generally, you close the bleeding screw or nipple closest to the now retracted rod.
ComNav Marine 1420 Autopilot System Wiring the Processor Place the Processor in front of you with the lettering right side up. Remove the four Phillips screws from each end. Remove the end pieces of the Processor enclosure. Looking into the open ends of the Processor you will see several green terminal strips. These terminal strips are mounted into sockets. You can remove the terminal strips from the processor by gently pulling them away from the end of the Processor.
ComNav Marine 1420 Autopilot System Right Side, Cable 1 (Control Head) to J6 Note: There is an extra wire that is not used, in the 1420 Head’s cable; the wire is yellow on the original cable, brown on the alternate cable. Right Side Connections Pull all of the terminal strips from the right hand end of the Processor. Caution: there are some differences in the colour codes of the cable types that can be used for Cable 1 (the Head), and Cable 2 (the Fluxgate Compass).
ComNav Marine 1420 Autopilot System Original Cable Colours GREEN RED BLACK BLUE WHITE YELLOW SHIELD Alternate Cable Colours GREEN PINK GREY YELLOW WHITE BROWN SHIELD Right Side, Cable 2 (Compass) to J6 Be Careful The entire stripped end – but no portion of the insulation – of all wires into the terminal strip plugs must be completely inside the plugs. The stripped ends of wire must not be able to touch each other.
ComNav Marine 1420 Autopilot System Right Side, Cable 3 (Rudder Feedback) to J7 Left Side Connections Connecting the Ground Wire Next, do the left side wiring. Remove the terminal strips from the left side end piece. In the Cable 5 diagram below, the Ground is the green wire. It is connected to the bolt beside the terminal sockets for the power connection.
ComNav Marine 1420 Autopilot System Left Side, Cable 4 (Pump Motor) Please see the Appendices for wiring to other types of motors, or solenoids. Left Side, Cable 5 (Power) Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System Left Side, Optional Navigation Input Connection Connecting the Navigation Cable Use the diagram above to wire the navigation input. The terminal strip for this is in the Accessory Kit. The optional navigation data input cable may be connected at this time. Parts for this are in the Accessory Kit. We do not supply the cable for this connection. See your GPS receiver, plotter and/or other navigation device manuals for information about wiring connections to & from them.
ComNav Marine 1420 Autopilot System Mounting the Processor Powering Up the System Once you have completed and checked the wiring, you are ready to mount the Processor. Turn on the breaker for the Autopilot or connect the Power cable to the breaker. There are two ways this can be done, depending on the amount of space you have. The first method will usually be easier. The black wire connects to the negative terminal. The white wire connects to the positive terminal. The green wire is ground.
ComNav Marine 1420 Autopilot System Fuse Replacement Check the Fuse The 1420 Processor is protected against reversed power connection by a fuse. The fuse will blow if the power wiring is reversed; but the fuse will usually not fail otherwise. Do this before leaving the dock: – turn on the Autopilot. Press the Red and Green Keys to move the rudder (or outboard motor). ⇒ If the new fuse fails at this time, you still have an electrical problem on your boat, or the Autopilot needs repair.
ComNav Marine 1420 Autopilot System Setting Up the Autopilot System Setup Routine The 1420 System must be OFF before you begin the Setup Routine. The first part of this routine can be done at the dock. If you have a Fluxgate Compass, you will later repeat the first part out on open water. If the light above the Pilot Key flashes at any time during the Setup Routine, the 1420’s firmware has detected an error in the procedure, or in the system’s wiring.
ComNav Marine 1420 Autopilot System 5. Press the Red Key 8. You are now in the Bleed Mode Turn to Fill And Bleed on page 30. Come back here, when done. If you did not install a Reversing Pumpset, or you are not retro-fitting the 1420 on a vessel that already has hydraulic steering, you will not have to bleed your hydraulic system. Go to step 9 instead. The Autopilot will beep. The light under the Red Key will stop flashing. The light under the Speed Key will begin to flash. 9.
ComNav Marine 1420 Autopilot System Fluxgate Compass Compensation In order to complete the setup of a Fluxgate Compass, it is necessary to take a short trip with your boat. When the measurements are successful, the Autopilot will turn off. The Setup Routine is now completed. Put your tools and other magnetic objects in storage places away from the Fluxgate Compass.
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ComNav Marine 1420 Autopilot System Piloting with the 1420 Autopilot System This section will introduce you to your ComNav 1420 Autopilot System. Learn your Autopilot's operations step by step; you will find it is one of the simplest things on your boat! • Some vessels always respond quickly to a small movement of the steering wheel, regardless of the boat speed. These boats might get the best steering control by always using the Fast setting.
ComNav Marine 1420 Autopilot System ⇒ If your vessel is swinging back and forth across the Course line, like this: Determining Rudder Response Settings At this point, you will have finished adjusting your compass. Move your boat to an open area of water away from docks and other boats. Your vessel will normally make several turns, while you are setting the Rudder Responses. Make sure that you and your passengers are braced for unexpected movement.
ComNav Marine 1420 Autopilot System Slow Speed Turns and Course Changes ⇒ If your vessel is gradually falling away from the Course line, like this: At this point – while you are still travelling slowly, and with the Slow Speed Response set properly – it’s a good time to learn how to use your 1420 Autopilot to make turns and changes in Course at Slow speed. To make a one degree Course change to Starboard, briefly press the Green key. To make a one degree course change to Port, briefly press the Red Key.
ComNav Marine 1420 Autopilot System Setting the Fast Speed Rudder Response ⇒ If your vessel falls away from the Course line, the Fast Speed Rudder Response Sensitivity is set too low. In order that the 1420 Autopilot can steer your boat in a straight line & make smooth turns when your boat is moving at “fast” speeds, you will need to adjust the Sensitivity of the Fast Speed Rudder Response. To increase Sensitivity: Press and hold the Speed Key. Press the Green Key.
ComNav Marine 1420 Autopilot System The Navigation Interface The 1420 Autopilot System can use navigation data information sent to it from a navigation device (such as a GPS receiver or a chartplotter), if the data is in NMEA 0183 format. See page 38 for navigation connection instructions. Note: ComNav Autopilots fully conform to the syntax of the NMEA 0183 Standard’s language. However, not all models & types of “navigation equipment” do in fact conform to the NMEA standard (especially older models).
ComNav Marine 1420 Autopilot System Cross Track Error Using the Navigation Interface To be safe, learn to use your Navigation Interface at slow speeds, away from other vessels. Cross track error is a measure of the distance your boat has fallen away from the Course line. Turn on the navigation device. Cross track error is measured as the length of a line drawn from the Course line to your position, at right angles to the Course line. This could be a GPS, plotter, or other device.
ComNav Marine 1420 Autopilot System Operation Commands COMMAND Steer by Compass ACTION RESULT Point bow onto desired Course Boat will settle on Course Press Pilot Key Course Change: small, to Port Press Red Key once for every degree of desired change Course change to Port Note: also influenced by Speed Key setting Course Change: Press Green Key once small, to Starboard for every degree of desired change Course change to Starboard Course Change: large, to Port Boat will settle on new Course’s hea
ComNav Marine 1420 Autopilot System Operation Commands (continued) COMMAND ACTION RESULT Dodge: to Port Press and hold Red Key Dodge: to Starboard Press and hold Green Key Rudder Response: change Press Speed Key twice quickly The Autopilot will switch to the other set of Rudder Response settings Steer by GPS, plotter, etc. Enter Waypoint on device The Light above the Nav Key will turn on. The Autopilot will steer by compass and the NMEA data received.
ComNav Marine 1420 Autopilot System Adjustment Commands COMMAND Rudder Response Sensitivity: decrease ACTION Press and hold Speed Key & then press Red Key once for each step of reduction in Response Sensitivity RESULT The Autopilot will not react as strongly to course deviations. It may "settle down" onto a Course line more quickly, and/or stop swerving back and forth across the Course line. There are two Rudder Response settings.
ComNav Marine 1420 Autopilot System Problem Solving Problems during the Setup Routine If the 1420 Autopilot finds a problem during the Setup Routine, the Pilot Key light will flash repeatedly. The problems which the Autopilot can detect during the various steps of the Setup Routine are listed below. Once you have fixed the problem, press the Pilot Key to begin the Setup Routine from where you left off.
ComNav Marine 1420 Autopilot System Problems during Normal Operation When the 1420 Autopilot detects a problem it will flash the lights on the Control Head. Note: it is not possible for the Autopilot to warn you of every potentially serious problem which can occur. You must be responsible for the safe operation of your vessel. HEAD INDICATION All the lights blink on and off PROBLEM & HOW TO FIX You have one of the following problems: 1. Your vessel is off course.
ComNav Marine 1420 Autopilot System HEAD INDICATION PROBLEM & HOW TO FIX The lights are all blinking and The Processor has overheated. the Autopilot is no longer moving CHECK: the rudder or the outboard. • Is there a short circuit in the connection to the Reversing Pump? • Is the rudder or outboard motor free from any debris which would interfere with its motion? The light above the Pilot Key is The Rudder Feedback has failed and the Ghost Rudder blinking. program is running.
ComNav Marine 1420 Autopilot System HEAD INDICATION PROBLEM & HOW TO FIX The Autopilot will not switch to The Autopilot is not receiving any useful navigation data Nav function. from the navigation device. CHECK: • That the navigation device is turned on. • That you have entered a destination or waypoint into the navigation device. • That your wiring is correct at the Processor and at the back of the navigation device.
ComNav Marine 1420 Autopilot System Problems during Turn On The Autopilot will not turn on You may have one of the following problems: 1. The battery is dead or the battery connections are faulty 2. The fuse is faulty and must be replaced – See page 40. 3. The Off Key is stuck – Try to free the Off Key. 4. The Autopilot hardware or firmware is faulty – Call your ComNav Marine Dealer for service. The lights are blinking Either of the Red Key, Green Key or Nav Key has stuck. – Try to free the keys.
ComNav Marine 1420 Autopilot System Appendix A Connections to 4 and 5 Wire Motors Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System Appendix B Connections to 4 and 5 Wire Motors (using a clutch or lockup valve) Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System Appendix C Connections to Solenoid Valves Document PN 29010012 V1.
ComNav Marine 1420 Autopilot System Appendix D Connecting a Second Station J8 RED BLACK OR BROWN GREEN BLUE WHITE OR ORANGE SHIELD J6 J7 Right Side, Optional Second Station Connections (J8) Installation The cable gland for the Second Station is included in the package with the Second Station Kit; the gland must be mounted on the end cap. To locate the hole for the gland, look on the inside of the end cap.
ComNav Marine 1420 Autopilot System Operation The 1420 Second Station is identical in operation 4 to the main Control Head, as described in the section Piloting with the 1420 Autopilot System. Only one of the Control Heads can operate the autopilot at any time. The unit that is non-active will have all 5 LEDs on at once. To activate the non-active control, press and hold both the Red & Green Keys. The Control Head will come on in the same mode in which the previously active Control Head was operating.
ComNav Marine 1420 Autopilot System Appendix E Connecting the NMEA 0183 Heading Output Location of terminal strip J5 The 1420 Autopilot has a data bus that sends out NMEA 0183 heading information to other external devices such as Radars. Heading data is transmitted once per second and provides two NMEA sentences: HDM (magnetic heading) and HDG (magnetic heading, deviation & variation). The serial data rate is 4800 Baud. The output signal has enough drive capability for up to six NMEA 0183 Listeners.
ComNav Marine 1420 Autopilot System Appendix F Connecting a Rudder Angle Indicator SIGNAL RETURN Right-Side, Optional RAI Connection The cable gland for a Rudder Angle Indicator is in your Accessory Kit. We do not supply a cable for this installation. We recommend #22 AWG, two conductor cable; it must be round, in order to make a water-tight seal in the gland. The outer diameter of this cable must not exceed ¼” (6.5 mm), nor be less than 5/32” (4 mm).
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ComNav Marine 1420 Autopilot System WARRANTY INFORMATION Limited Warranty Agreement Congratulations! You have purchased sophisticated and sensitive marine equipment (the “Equipment”) manufactured by ComNav Marine Ltd. of #15 13511 Crestwood Place, Richmond, British Columbia, Canada, V6V 2Gl (“ComNav”).
ComNav Marine 1420 Autopilot System NO LIABILITY FOR CONSEQUENTIAL DAMAGES TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL COMNAV, ITS EMPLOYEES, SUPPLIERS, OR REPRESENTATIVES BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION DAMAGE FROM COLLISION WITH OTHER VESSELS OR OBJECTS, INJURY TO ANY PERSON OR PERSONS, DAMAGE TO PROPERTY, LOSS OF INCOME OR PROFIT, BUSINESS INTERRUPTION, OR ANY OTHER CONSEQUENTIAL, INCIDENTAL, RESULTING PUNITIVE, OR SPECIAL DAMAGES ARISING OUT
ComNav Marine 1420 Autopilot System CUSTOMER REMEDIES ComNav’s entire liability and the Purchaser’s exclusive remedy against ComNav for the defective Equipment shall be, at ComNav’s option, either: (a) repair or replacement of the defective Equipment under the warranties set forth in this Agreement, or, (b) refund of the purchase price of the defective Equipment, all pursuant to and in accordance with the conditions set forth below: 1. 2. 3. 4. 5. 6. 7. 8.
ComNav Marine 1420 Autopilot System CHOICE OF LAW AND JURISDICTION This Agreement is governed by the laws of the Province of British Columbia, Canada.
ComNav Marine 1420 Autopilot System CE COMPLIANCE This product is in compliance with the Electro-Magnetic Compatibility (EMC) standards of the European Community, and bears the CE mark. It was tested according to the applicable sections contained in: CE Directives IEC 945:1994, BS EN 60945:1996 Marine Navigational Equipment, General Requirements The applicable sections for methods of testing and required test results are: Section 4.5.4: Radiated interference Section 4.5.
ComNav Marine 1420 Autopilot System USER NOTES You can use this table to record the serial numbers of the components of your system, setup settings, any notes you made during installation, and any other information you might want to keep handy. HEAD S/N: PROCESSOR S/N: COMPASS S/N: RUDDER FEEDBACK S/N: PUMP S/N: Document PN 29010012 V1.
