The Night My Autopilot Saved Me
There's a moment in every long passage when exhaustion stops being a feeling and becomes a physical weight pressing on your eyelids. I was three days into a solo crossing, and the sea had been relentless—short, steep waves that made the boat roll and snap. I'd been hand-steering for hours, and my arms ached. When I finally engaged the autopilot, it was like handing the wheel to a silent, tireless friend. It held the course through the night while I dozed in the cockpit, ready to wake at any change. That autopilot didn't just steer the boat; it kept me alive.
Since then, I've installed and tested autopilot systems on sailboats and powerboats, from small tiller pilots to full hydraulic systems. I've learned what makes a good autopilot, what fails, and why you should never trust it blindly. This guide is for anyone considering adding an autopilot to their boat—or upgrading an old one. It's a big investment, and the wrong choice can be frustrating at best, dangerous at worst.
Why You Should Trust Me
I'm Elena Rodriguez. I've crossed the Atlantic alone on a 1978 sailboat I rebuilt myself, and I've worked as a marine electrician for over a decade. I've installed autopilots on everything from 25-foot sailboats to 50-foot trawlers, and I've spent thousands of miles trusting them with my course. I don't sell autopilots, and I don't take money from manufacturers. Some of the links in this guide pay me a commission if you buy through them, but that doesn't change what I recommend. In the middle of the ocean, there's no Amazon—so I only tell you what I'd trust with my own boat.
If that filtered list is empty, try this unfiltered search. And for budget alternatives, check DHgate—prices are lower, but shipping takes longer and quality varies, so read reviews carefully.
Types of Autopilots: Which One Fits Your Boat?
Before I get to the specific systems, let's clear up the main types. Autopilots are not one-size-fits-all. They fall into a few categories based on how they steer the boat:
- Tiller pilots. Designed for small sailboats with a tiller. They're simple, affordable, and attach directly to the tiller. Good for boats under 30 feet, but limited in rough conditions.
- Wheel pilots. Attach to the wheel on sailboats or small powerboats. They use a belt or drive unit to turn the wheel. Fine for coastal cruising and smaller boats, but can struggle in heavy seas.
- Below-deck hydraulic or linear drives. These are the serious systems. A hydraulic pump or electric linear drive is connected directly to the rudder stock or steering quadrant. They handle big loads and rough weather with ease. These are what you see on offshore sailboats and larger trawlers.
For most boaters, the choice comes down to boat size, steering type, and how far offshore you go. I've tested or installed all three types. Here's what I'd recommend in each category.
The Five Autopilot Systems, Ranked After Real Use
1. Raymarine Evolution EV-100 Wheel Autopilot — The Best for Sailboats Under 40 Feet
The Raymarine Evolution series is my go-to recommendation for most sailors. The EV-100 is designed for wheel-steered sailboats up to about 35 feet, and it's remarkably good. The system uses a 9-axis sensor that learns your boat's motion and adjusts steering accordingly. I've installed several of these, and the performance is consistently impressive. In a seaway, it holds a course better than most human helmsmen. The installation is straightforward, and the control head is intuitive. It's not the cheapest, but it's reliable and well-supported.
Downside: the wheel drive can be noisy, and it's not suitable for boats over 40 feet or those with hydraulic steering.
2. Garmin Reactor 40 Hydraulic Autopilot with GHC 50 — The Best for Powerboats and Hydraulic Steering
If you have a powerboat with hydraulic steering, the Garmin Reactor 40 is an excellent choice. It's a below-deck hydraulic system that integrates seamlessly with Garmin chartplotters. I've installed this on a 45-foot trawler, and it was flawless. The system holds a straight course in wind and current, and the "shadow drive" feature lets you take manual control without disengaging the autopilot. The GHC 50 control head is bright and easy to use. It's a premium system, but for a boat you rely on, it's worth the investment.
Downside: it requires hydraulic steering, and the installation is more involved than a wheel pilot. You'll likely need a professional.
3. Simrad TP32 Tillerpilot — The Best Budget Option for Small Sailboats
For small sailboats with a tiller, the Simrad TP32 is a classic. It's simple, rugged, and affordable. It clamps onto the tiller and uses an internal compass to hold a course. I used one on my first small sailboat, and it never let me down in moderate conditions. It's not as sophisticated as the Evolution series, and it can struggle in following seas, but for a 25-foot boat on a budget, it's a fantastic value. I've also heard good things about the Raymarine ST1000+, which is similar.
Downside: limited power, not for boats over 30 feet or heavy weather. It's also a bit noisy.
4. B&G Triton2 Pilot Controller with NAC-3 Computer — The Best for Serious Offshore Sailors
B&G is the same parent company as Simrad and Lowrance, but their gear is aimed squarely at performance sailors. The Triton2 pilot controller paired with the NAC-3 autopilot computer is a powerful setup for larger sailboats. It integrates with B&G's sailing instruments, allowing the autopilot to steer to wind angle, which is invaluable for offshore passages. I've sailed with this system on a friend's 45-foot cruising boat, and it was rock solid. The build quality is excellent, and the wind steering is precise. If you're planning an ocean crossing, this is the system I'd want.
Downside: it's expensive, and the installation is complex. You need a compatible drive unit and instrument network.
5. Si-Tex SP-70 Wheel Pilot — The Budget Wheel Option That's Just Okay
Si-Tex makes affordable marine electronics, and the SP-70 is their entry-level wheel pilot. It's similar to the Raymarine EV-100 but less refined. I've installed one on a small powerboat, and it worked, but the motor was noisy, and the course-keeping was a bit sloppy in chop. The control head is dated, and the menu system is clunky. For a very tight budget, it'll steer the boat, but I'd save up for the Raymarine or Garmin if you can. I don't recommend it for anything beyond occasional coastal use.
Downside: noisy, less precise, older interface.
Decision Matrix: Which Autopilot Should You Buy?
| Your Boat and Steering | Best Pick | Why |
|---|---|---|
| Sailboat under 35 ft with wheel | Raymarine EV-100 | Excellent course keeping, easy install, reliable |
| Powerboat with hydraulic steering | Garmin Reactor 40 | Seamless Garmin integration, shadow drive, robust |
| Small sailboat with tiller | Simrad TP32 | Affordable, simple, good for small boats |
| Large offshore sailboat | B&G Triton2 + NAC-3 | Wind steering, professional grade, precise |
| Budget wheel pilot | Si-Tex SP-70 | Cheap, but noisy and less precise |
Still unsure? Ask yourself: What kind of steering do I have, and how far will I go? For offshore work, invest in a quality below-deck system. For coastal cruising, a wheel or tiller pilot is often enough.
Who Should NOT Buy an Autopilot
An autopilot is a luxury for some, a necessity for others. Here's who should skip it:
- You only make short day trips in calm, familiar waters. Your hands are fine, and the cost isn't justified.
- Your boat is very small (under 20 feet) and you enjoy hand-steering. A tiller pilot might be overkill.
- You're on a very tight budget and your boating doesn't require long passages. Save the money for other safety gear.
But if you make long passages, single-hand, or just want a break from the helm on a long motor, an autopilot is one of the best investments you can make. It reduces fatigue and lets you manage the boat more safely.
What to Look for When Shopping
These are the three things I check before recommending any autopilot:
- Compatibility with your steering system. This is the most common mistake. Make sure the autopilot you buy works with your boat's steering—tiller, wheel, or hydraulic. Check the manufacturer's specs carefully.
- Drive unit power and boat size. The drive unit must be powerful enough for your boat's displacement and rudder size. Undersized drives fail in rough weather. Follow the sizing charts.
- Control head and integration. Look for a control head that's easy to use, especially at night. If you have a chartplotter, consider an autopilot that integrates with it for waypoint following and route steering. Garmin and Raymarine have excellent ecosystems.
And one more thing: always have a way to disengage the autopilot instantly. A big red button or a quick-release lever can save you in an emergency. I've had to grab the wheel in a hurry more than once.
My Verdict
After installing and testing these systems on real boats, my recommendation is clear: for most sailors under 40 feet with wheel steering, the Raymarine Evolution EV-100 is the best all-around choice. It holds a course beautifully, it's reliable, and the installation is within reach of a competent DIYer. If you have a powerboat with hydraulic steering, the Garmin Reactor 40 is my top pick—it's robust and integrates seamlessly with Garmin chartplotters.
For serious offshore sailors, the B&G Triton2 + NAC-3 is the professional-grade system that will steer to wind and keep you safe on long passages. And if you're on a small boat with a tiller, the Simrad TP32 is a proven, affordable workhorse.
Whatever you choose, remember: an autopilot is a tool, not a replacement for a human watchkeeper. Always keep a lookout, and never trust your autopilot with your life—trust it with your course, but keep your eyes open.
If that list is empty, try this unfiltered search. And for budget options, check DHgate—prices are lower, but shipping takes longer and quality varies.
Frequently Asked Questions
Can I install an autopilot myself?
It depends on the type. Tiller pilots and some wheel pilots are DIY-friendly, especially if you're comfortable with basic electrical work. Below-deck hydraulic systems are more complex and often require professional installation. Always read the manual and have a friend help. If you're unsure, hire a marine electrician.
How much does a boat autopilot cost?
A basic tiller pilot costs around $400-$600. Wheel pilots run $1,000-$1,500. Below-deck hydraulic systems start around $2,000 and can go up to $5,000 or more, not including installation. It's a significant investment, but worth it for offshore use.
Will an autopilot work with my chartplotter?
Many modern autopilots integrate with chartplotters via NMEA 2000 or Ethernet. This allows the autopilot to follow a route or hold a waypoint. Check compatibility before you buy. Garmin and Raymarine have the most seamless ecosystems, but other brands can work with adapters.
What is the difference between a wheel pilot and a below-deck autopilot?
A wheel pilot uses a drive unit that attaches to the wheel, turning it to steer. It's limited in power and can be noisy. A below-deck autopilot connects directly to the rudder or steering quadrant with a hydraulic or linear drive, providing much more power and reliability for larger boats and rough conditions.
Do I still need to keep watch with an autopilot?
Yes. An autopilot steers the boat, but it cannot see obstacles, other vessels, or changing conditions. You must maintain a proper lookout at all times. The autopilot is a tool to reduce fatigue, not a replacement for a human watchkeeper.
Written July 2026. Autopilot models and features change, but the fundamentals of safe navigation don't. Always verify current specs and compatibility before you buy.