Autopilot Backup Options: Redundancy Choices

Why backup matters

An autopilot is a convenience, not a replacement for a lookout. The U.S. Coast Guard Boating Safety page reminds boaters that safe operation depends on the operator's knowledge and skill. An autopilot can steer for you, but you still need to watch where you are going and be ready to take the helm.

If the autopilot stops working, you need a way to steer manually. That is the core of redundancy: having a second way to control the boat's direction. For some boats, the manual steering system is always there, and the autopilot simply engages and disengages. For others, a backup autopilot or a second drive unit makes sense. To see what complete systems offer, browse the best complete autopilot packs.

What redundancy means for an autopilot

Redundancy in an autopilot system means having more than one way to achieve the same result: keeping the boat on a heading. This can be as simple as a manual steering override that lets you take the wheel at any time, or as involved as a second drive unit connected to the same course computer.

The listings on this site describe complete autopilots and core packs. They name the parts in the box, such as the drive unit and control head. They do not usually describe redundancy features. To understand what backup options a system offers, you compare the stated details and then ask the maker or a dealer. For a deeper look at what a core pack includes, see autopilot core pack without drive.

Manual override options

Every autopilot works with the boat's existing steering. When the autopilot is off, you steer by hand. The question is how easy it is to switch between autopilot and manual steering.

Some systems have a clutch that disengages the drive from the steering. Others use a solenoid or a manual release. The listings may name the drive type, such as a linear drive or a hydraulic pump, but they do not describe the clutch mechanism. For that detail, you read the maker's manual or ask a dealer.

For a tiller pilot, the unit is often removable. You take it off the tiller and steer by hand. That is a simple form of manual override. If you are considering a tiller pilot, the best tiller pilots guide can help you compare options.

Second drive options

A second drive unit gives you a backup if the main drive fails. For example, a boat with hydraulic steering might have a second hydraulic pump. A boat with a wheel could have a spare wheel drive.

The Raymarine drive unit page lists several types: cockpit tiller drive, wheel drive, hydraulic pumps, rotary drives, and linear drives. Each matches a steering system. If you want a second drive, you choose one that matches your steering type and the boat's size and weight, as the maker's page describes.

A second drive is not always practical. It adds cost and complexity. For many boats, a manual steering override is enough. For a long cruise or a boat used far from help, a second drive might be worth considering. To understand how drive types differ, read autopilot drive types explained.

Tiller pilot as a backup

For small sailboats, a tiller pilot can serve as a backup to a larger autopilot or as the primary autopilot. The Raymarine ST1000+ and ST2000+ are self-contained cockpit tiller autopilots for sailboats, as the pack page states.

A tiller pilot attaches to the tiller and steers the boat. It is portable, so you can store it below and bring it out when needed. That makes it a natural backup for a boat that already has a below-deck autopilot.

If you are considering a tiller pilot as a backup, check that it suits your boat's steering. The maker's page for the tiller drive states it is for tiller-steered sailing boats up to a certain displacement. You compare that to your boat's size. For more on tiller steering, see autopilot for tiller steering.

What listings tell you about backup

Listings on this site name the parts in the box. A complete pack includes a drive, a control head, and a sensor. A core pack leaves out the drive or the control head. That tells you what you have to work with.

If a listing says "no drive" or "requires pump," you know the pack does not include a drive. You would need to buy one separately. That could be an opportunity to choose a second drive or to keep an existing drive. The best autopilot core packs guide explains what core packs offer.

Listings do not state whether a system has a manual override or a backup mode. Those details are in the maker's manual or from a dealer. The site compares stated details only, so you cannot infer redundancy from a listing alone.

Questions to ask before buying

Before you choose a backup approach, ask a few questions. What steering system does your boat have? The answer decides which drive types are possible. The Raymarine drive page says to consult an authorized dealer if you are not sure.

How do you use the boat? A day sailor might not need a second drive. A cruiser crossing open water might want one. A fishing boat that spends hours at trolling speed might benefit from a backup that can steer while you handle lines.

What does the pack include? If you buy a core pack without a drive, you can choose a drive that fits your steering and your backup plan. If you buy a complete pack, the drive is in the box, and you add a second drive only if you want one.

Ask the maker or a dealer about the clutch, the manual override, and whether a second drive can be connected to the same course computer. The site cannot answer those questions from the listings. For guidance on choosing a control head, see autopilot control head options.

Redundancy and networks

An autopilot often connects to a network such as NMEA 2000. The NMEA 2000 standard describes a network that interconnects marine electronics, sharing data and commands. A backup autopilot or a second control head can be part of that network.

If you have a chartplotter on the network, you might use it as a backup control head. The listings name control heads such as the p70 or GHC 50, but they do not state whether a chartplotter can control the autopilot. That is a compatibility question for the maker.

Redundancy on the network side means having more than one way to send commands. A second control head or a remote control can serve that role. The Furuno NavPilot 300 includes a gesture controller that works by Bluetooth, as the product page states. That is a form of remote backup control. For more on network integration, see autopilot NMEA 2000 connectivity.

What to pick for your situation

The right backup depends on your boat and how you use it. For a small sailboat, a tiller pilot is a simple, portable backup. For a powerboat with hydraulic steering, a second hydraulic pump might be overkill unless you cruise far from help.

Compare listings on stated details: the drive type, the control head, and whether a drive is in the box. Then ask the maker or a dealer about manual override and second-drive options. The guides below can help you narrow the choices.

What to pick for your situation

Questions

What is the simplest backup for an autopilot?

The simplest backup is the manual steering system that is always there. You disengage the autopilot and steer by hand. For a tiller pilot, you remove the unit from the tiller.

Can I add a second drive unit to my autopilot?

Some systems allow a second drive unit, but the listings do not state this. You need to ask the maker or a dealer whether your course computer can control two drives.

Does a tiller pilot work as a backup for a larger autopilot?

For small sailboats, yes. A tiller pilot is portable and can be stored below. Check that it suits your boat's displacement, as the maker's page states.

What does a core pack include for backup purposes?

A core pack leaves out the drive or the control head. That means you can choose a drive that fits your backup plan, or you can keep an existing drive.

Do listings mention manual override features?

No. Listings name the parts in the box, such as the drive and control head. Manual override details are in the maker's manual or from a dealer.