Humminbird APEX 16 MEGA SI+ Chartplotter CHO: The Ultimate Marine Electronics Upgrade

In the world of advanced fishing and marine navigation, few names stand out like Humminbird. Known for cutting-edge sonar technologies and innovation, Humminbird’s APEX series has revolutionized the way anglers experience the water. Among the elite devices in this lineup is the Humminbird APEX 16 MEGA SI+ Chartplotter CHO—a powerhouse of precision, clarity, and integration.

Whether you’re a professional angler, serious offshore boater, or just passionate about high-end sonar imaging, the APEX 16 is built to exceed expectations. This article dives deep into everything you need to know about the APEX 16 MEGA SI+ CHO, its features, specifications, performance, and why it’s one of the best choices on the market today.

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What is the Humminbird APEX 16 MEGA SI+ Chartplotter CHO?

The Humminbird APEX 16 MEGA SI+ CHO is a high-resolution 16-inch multifunction display (MFD) designed to deliver professional-grade sonar imaging, GPS chart plotting, and advanced networking in one sleek unit. “CHO” stands for Control Head Only, meaning it ships without a transducer, giving users flexibility to pair it with the sonar technologies they need.

It supports MEGA Side Imaging+, MEGA Down Imaging+, Dual Spectrum CHIRP sonar, and built-in GPS with chart plotting. Additionally, it integrates seamlessly with Humminbird’s One-Boat Network, enabling full control of trolling motors, shallow water anchors, and more.

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Key Features of the APEX 16 MEGA SI+ CHO

1. 16-Inch Full HD Touchscreen

• 1920×1080 resolution provides a full HD display that delivers crystal-clear images of underwater structures and fish.

• The large screen is perfect for split-screen views, making it easy to monitor maps, sonar, and radar simultaneously.

• Designed with Cross Touch® Interface, users can control it via touch or keypad, ensuring reliability in all weather conditions.

2. MEGA Side Imaging+ and Down Imaging+

• Offers 3x the output of standard Side Imaging and Down Imaging, delivering unprecedented detail out to 250 feet on either side (SI) and below (DI) your boat.

• Ideal for locating fish-holding structures like brush piles, ledges, and drop-offs.

3. Dual Spectrum CHIRP Sonar

• Uses a wide range of frequencies to give you detailed fish arches and better target separation.

• Great for distinguishing baitfish from game fish.

4. Networking and Integration

• Compatible with NMEA 2000, Radar, Autopilot, and AIS systems.

• Integrates with Minn Kota trolling motors and Talons/Raptors for total boat control.

• Ethernet networking allows connection with multiple Humminbird units and accessories.

5. Built-in GPS and Humminbird Basemap

• High-sensitivity GPS and Humminbird Basemap provide accurate navigation out of the box.

• Supports premium maps such as Navionics, LakeMaster, and CoastMaster.

6. Control Head Only (CHO) Flexibility

• The CHO version allows custom setups with Airmar transducers or Humminbird’s own advanced sonar options.

• Ideal for anglers upgrading an existing system or using third-party sonar technologies.

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Technical Specifications

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Benefits of Using the Humminbird APEX 16

1. Superior Imaging and Sonar Clarity

With MEGA Imaging+, you’ll get industry-leading underwater detail. This helps significantly with structure identification, target tracking, and fish finding.

2. Professional-Grade Display

The large 16″ screen with high resolution ensures no detail is missed. Whether you’re fishing in sunlight or under cloud cover, the screen remains visible and intuitive.

3. Flexible Installation

As a CHO model, the APEX 16 lets you choose your own transducer setup, which is especially valuable for custom installations on larger boats or vessels with specific sonar needs.

4. Total System Control

With compatibility across the One-Boat Network™, the APEX 16 becomes the brain of your boat. Control trolling motors, view live sonar, manage radar overlays, and adjust anchor positions all from one screen.

5. Smart Networking and Expandability

Through Ethernet and NMEA 2000 connections, the APEX 16 allows integration with radars, autopilot systems, AIS, and external GPS antennas, offering unparalleled customization for your boating needs.

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Ideal Users: Who Should Choose the Humminbird APEX 16?

The APEX 16 MEGA SI+ CHO is perfect for:

• Tournament anglers who need the most accurate fish-finding and structure-scanning tech.

• Offshore boaters seeking wide-area sonar coverage with deep-water capabilities.

• Charter captains who want a professional-grade system with high reliability and performance.

• Recreational fishers upgrading from mid-tier sonar and chartplotters for better accuracy.

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Setup and Installation Tips

1. Choose the Right Transducer

Because it’s a CHO model, you’ll need to purchase a transducer separately. Recommended options include:

• XM 14 HW MSI T – for MEGA Side Imaging and Down Imaging performance.

• Airmar transducers – for deep-sea applications.

2. Network It

If you have multiple Humminbird units, connect them via Ethernet to share sonar and waypoints.

3. Mount Securely

Choose between in-dash flush mounting or the included gimbal bracket depending on your boat’s dashboard layout.

4. Update Software

Always update to the latest software via Humminbird’s website or SD card to gain access to new features and ensure compatibility.

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Price and Availability

As of 2025, the Humminbird APEX 16 MEGA SI+ CHO is priced between $4,299 and $4,999 USD, depending on the retailer and whether promotions or bundles are available.

Where to Buy:

• Humminbird Official Site

• Bass Pro Shops

• Cabela’s

• Amazon

• West Marine

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Comparison: APEX 16 vs. SOLIX 15

Conclusion: The APEX 16 offers a higher-resolution display and the flexibility of a CHO setup, making it better suited for pro-level users.