Simrad NAC-1 hydraulic pack review pros cons

Introduction

The Simrad NAC-1 hydraulic pack with MKII PUMP-1 and Precision-9 is a complete autopilot solution tailored specifically for single outboard engine boats. It brings plug-and-play simplicity, robust performance, and unmatched reliability to your marine navigation system. Whether you’re cruising, fishing, or docking, this integrated pack delivers confidence, accuracy, and control over your vessel’s heading.

This powerful pack includes the NAC-1 computer, MKII Hydraulic Pump-1, and the highly accurate Precision-9 compass. It is fully compatible with Simrad GO and NSS displays and leverages the NMEA 2000 network for seamless communication with your onboard systems.

Overview / What Is Simrad NAC-1 Hydraulic Pack

The Simrad NAC-1 hydraulic pack is designed for boats with single outboard hydraulic steering systems. It automates vessel steering via a powerful hydraulic pump (MKII PUMP-1), controlled by the NAC-1 autopilot computer and Precision-9 solid-state compass for precise heading feedback.

This system allows for automated route tracking, waypoint steering, and advanced navigation features from your Simrad multifunction display. It is built to simplify hands-free steering, enhance safety in varying conditions, and reduce fatigue during long journeys on the water.

What’s Included in the Simrad NAC-1 Hydraulic Pack

• NAC-1 Autopilot Computer: Central processing unit for all autopilot functions.
• MKII PUMP-1: Re-engineered for quiet and efficient hydraulic performance.
• Precision-9 Compass: Delivers accurate heading and rate-of-turn data.
• All cables, connectors, and NMEA 2000 T-connectors: For seamless plug-and-play setup.

This complete outboard autopilot solution supports chartplotter-based steering, including route following and turn patterns such as U-turns and zigzags, ideal for trolling or maneuvering.

How to Install Simrad NAC-1 Hydraulic Pack

Installing the Simrad NAC-1 hydraulic pack requires mechanical knowledge and basic understanding of marine electrical systems. Here’s a high-level process:

1. Mount the MKII PUMP-1 to the hydraulic steering system close to the helm or engine.
2. Secure the NAC-1 computer in a dry, accessible location inside the helm.
3. Install the Precision-9 compass on a level surface away from magnetic interference.
4. Use the supplied NMEA 2000 connectors to link all components into the network.
5. Configure the system through your Simrad GO or NSS display.

While DIY installation is possible, professional installation is recommended for proper calibration, especially if integrating with sonar, radar, or additional steering functions.

Maintenance Tips

Proper maintenance of the Simrad NAC-1 hydraulic pack ensures optimal operation and extends the system’s life. Follow these care tips:

• Hydraulic Pump: Check for hydraulic fluid leaks and ensure tight hose fittings every few months.
• Compass Calibration: Periodically re-calibrate the Precision-9 compass after major metal additions to your boat or strong magnetic exposure.
• Software Updates: Keep your Simrad display and NAC-1 firmware current for improved performance.
• Check Connections: Inspect NMEA 2000 connections for corrosion, wear, or loose fittings seasonally.

Routine system checks before long journeys ensure your autopilot performs smoothly when it matters most.

Simrad NAC-1 Hydraulic Pack Performance in Real Conditions

Real-world users consistently report excellent handling with the Simrad NAC-1 hydraulic pack, especially in moderate sea states. The MKII pump is praised for its low noise and rapid course adjustments. Combined with Precision-9’s accurate heading data, it creates a smooth, stable ride over extended distances.

Anglers appreciate the pattern steering options, and cruisers benefit from the fatigue-reducing auto-routes. For windy or choppy days, the pack provides extra control and reduces oversteering by automatically compensating for drift and wave action.

Simrad NAC-1 Hydraulic Pack Troubleshooting Tips

If you’re experiencing issues with the Simrad NAC-1 hydraulic pack, consider the following troubleshooting strategies:

• Autopilot not engaging: Check NMEA 2000 network status and ensure display is communicating with NAC-1.
• Heading inaccurate: Reposition or re-calibrate the Precision-9 away from magnetic interference.
• Pump not responding: Confirm 12V power supply to the pump and check hydraulic pressure levels.

In most cases, updating firmware and ensuring all connections are clean and dry resolves common issues.

Expert Advice and Pro Recommendations

Marine professionals endorse the Simrad NAC-1 hydraulic pack as an efficient, high-performing solution for single-outboard boats up to 30ft. It is ideal for center consoles, bay boats, and small fishing vessels. When paired with Simrad NSS or GO series displays, you unlock advanced steering modes and chart-based navigation tools.

Experts also recommend placing the Precision-9 compass away from batteries, speakers, or stainless-steel structures to avoid heading interference. Regular sea trials after setup allow for better fine-tuning of gain and rudder settings.

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Comparing Simrad NAC-1 Hydraulic Pack to Competitors

When compared to similar autopilot systems, the Simrad NAC-1 hydraulic pack stands out for its ease of use, seamless Simrad ecosystem integration, and Precision-9 heading responsiveness. While Garmin and Raymarine offer similar packs, Simrad’s plug-and-play install and support for pattern steering give it the edge for anglers and coastal cruisers alike.

It’s worth noting that Simrad systems also integrate effortlessly with other devices such as Yamaha’s digital outboards and gauges — explore more at yamahaoutboards.com for additional compatibility insights.

Detailed FAQ Section

What size boats is the Simrad NAC-1 hydraulic pack suitable for?

The Simrad NAC-1 hydraulic pack is engineered for boats up to 30 feet with single outboard hydraulic steering. It provides precise, automated course correction and supports chartplotter-guided navigation for small- to medium-sized recreational vessels. It’s most effective on center consoles, bass boats, or bay boats where compact design, reliable hydraulic operation, and user-friendly integration are valued.

Can I install the Simrad NAC-1 hydraulic pack myself?

Yes, technically-savvy boaters with prior experience can install the Simrad NAC-1 hydraulic pack. The system includes plug-and-play NMEA 2000 connectors and detailed instructions. However, professional installation is recommended if you are unfamiliar with marine hydraulics or NMEA wiring. Precision installation ensures accurate heading calibration and minimizes risk of steering errors or hydraulic leaks.

What is the Precision-9 compass and how does it work?

The Precision-9 compass included in the Simrad NAC-1 hydraulic pack is a solid-state electronic compass that uses rate-sensing gyros and accelerometers to provide accurate heading data in real time. This data is critical for maintaining a steady course, initiating steering corrections, and providing input for route-based navigation. It’s resistant to vibration and offers quick calibration, making it ideal for use in rough marine environments.

How does the MKII PUMP-1 improve over older versions?

The MKII PUMP-1 used in the Simrad NAC-1 hydraulic pack has been upgraded for greater efficiency, lower noise output, and improved reliability. It features a compact design and delivers smoother hydraulic motion, which leads to more responsive course correction and reduced power draw. It’s optimized for small-to-medium hydraulic outboard steering systems, ensuring compatibility and extended service life with minimal maintenance.

How often should I service or update the Simrad NAC-1 hydraulic pack?

Basic checks should be done before each boating season, including inspection of hydraulic hoses, NMEA connections, and verifying compass calibration. Firmware updates should be performed annually through your Simrad display or app to benefit from performance improvements and added features. Proper seasonal storage and occasional calibration checks keep your Simrad NAC-1 hydraulic pack running in peak condition.

Conclusion

The Simrad NAC-1 hydraulic pack with MKII PUMP-1 and Precision-9 is one of the most efficient, intuitive, and reliable autopilot systems for single-outboard boats. From simplifying route navigation to reducing helm fatigue, it transforms your boating experience with seamless steering automation and precise heading accuracy.

Whether cruising offshore or navigating tight channels, this pack delivers premium Simrad quality in a complete, affordable package designed to keep you on course safely and effortlessly.

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