Autopilot Startup Checklist Before Every Voyage

What a startup review checks

A marine autopilot is a system, not a single box. The parts are a heading sensor or compass, a course computer often called an actuator control unit, a control head, a drive unit that moves the steering, and on many systems a rudder reference that reports rudder angle. The drive unit is the part that interfaces with the vessel's steering system, as the Raymarine drive unit page describes.

Because the parts work together, the pre-departure review follows a simple order: the heading sensor sees the boat's direction, the control head shows that heading to you, the drive responds when you steer, and the alarms tell you when something needs attention. Each step takes a minute at the helm.

• Have the maker's manual for the specific model at hand; it names the parts and the alarm messages.
• Use a known compass reading or a fixed bearing on shore as a reference for the heading check.
• If a part is missing from the pack you bought, the maker's page tells you what a pack does and does not include.

Heading sensor and heading display

The heading sensor tells the autopilot which way the boat points. Raymarine describes the Evolution EV sensor as the autopilot central processor and 3D heading sensor at the heart of every Evolution autopilot system. Furuno's NavPilot 300 page states that a heading source is required: a Furuno PG700, SC33, SCX20, or another compatible NMEA 2000 heading source. In plain words, an autopilot cannot hold a course if it has no heading to follow.

The startup check is simple: power the system on and confirm the display shows a heading that makes sense for the dock or berth. If you know the boat is pointing roughly north, the display should agree. A large disagreement is a reason to check the sensor mount and ask a dealer before you leave. Calibration steps are in the maker's manual, not in a general article. See the sensor requirements explainer for more on what a heading source does.

Rudder reference and drive response

The rudder reference, also called a rudder feedback unit, reports rudder angle back to the autopilot. Furuno's NavPilot 300 page names a Rudder Reference Unit (RRU) as a requirement for some features, and notes that some installations use software instead of a physical unit. The maker's page is the source for what your model needs.

For the startup review, turn the helm by hand while the autopilot is idle and watch the rudder angle readout if the system has one, or note whether the drive moves freely. A stiff wheel or a silent readout is a question for a qualified installer, not something to adjust at the dock. The drive types are covered in this explainer.

Alarms and alerts

The NMEA 2000 standard includes alerts as part of its message suite, so an autopilot can share alarm and status information with other equipment on the network. Off-course alerts, drive faults and low-voltage warnings are common alarm names in manuals and on listings.

The startup review of alarms is about knowing what each alarm means before it sounds. The maker's manual lists the alarm names and what triggers them. If a listing or manual names an alarm you do not recognize, ask the dealer or check the maker's page; this site compares stated details and does not publish installation or safety guidance. See the alarm settings explainer for the plain words.

An autopilot does not replace a lookout

The U.S. Coast Guard Boating Safety division works to reduce loss of life, injuries and property damage on U.S. waterways through boating safety education. Keeping a proper lookout is part of that duty. An autopilot steers the boat; it does not watch for traffic, hazards or people in the water.

The startup checklist is a review of the autopilot, not a substitute for the watch. Before leaving the dock, confirm the helm is manned, the crew knows their duties, and the autopilot is used as a steering aid.

When to ask a dealer or a qualified installer

The exact steps for checking sensors, calibrating the compass and adjusting alarms live in the maker's manual. Raymarine directs you to an authorized dealer when you are not sure how to determine the steering system; Furuno lists dealer contacts the same way. The manual for your model is the authority.

If the startup review shows something off, ask the dealer or a qualified installer. Do not rewire, re-calibrate or open the drive unit on your own; installation and commissioning are a qualified installer's job and are covered in the installation planning explainer.

When you choose a system, compare listings on stated details: whether the drive is in the box, whether the control head is included, and which sensor the pack uses. The buying guides below map those details to boat types.

What to pick for your situation

Questions

How often should I run the startup review?

Before every voyage, in the same order: heading sensor, heading display, rudder reference and alarms. It takes a few minutes at the helm and it is not a substitute for the maker's manual.

What if the heading on the display does not match a known compass reading?

Stop and ask a dealer or a qualified installer. The sensor or its mount may need attention, and calibration is covered by the maker's manual, not by this article.

Do I need the maker's manual for the review?

Yes. The manual lists the exact steps, alarm names and sensor checks for the specific model. This article gives the plain-words order, not the installation steps.

What does the rudder reference do in the review?

It reports rudder angle to the autopilot. In the review you confirm that the rudder readout follows your manual steering; a stuck or silent readout is a question for the installer.

Does the checklist replace keeping watch?

No. The U.S. Coast Guard Boating Safety division promotes boating safety education; the autopilot is a steering aid, and the crew keeps the lookout.

Where do I find what each alarm means?

In the maker's manual and on the maker's product page. Alarms are part of the NMEA 2000 alert message suite, so names can also appear on a networked display.