Autopilot Core Packs: What's Included and What's Not

What a core pack contains

A core pack is a partial autopilot system. It typically includes the electronic components that make decisions and sense the boat's heading, but not the drive that moves the steering. The exact contents vary by brand and model line, so you should read each listing's bullet list carefully.

In general terms, a core pack includes a course computer or actuator control unit (ACU), a heading sensor, and sometimes a control head. The course computer processes heading data and sends steering commands. The heading sensor measures the boat's direction. The control head is the interface you use to engage the autopilot and adjust the set course.

Some core packs also include network cables, mounting hardware, and other small accessories. The listing will state what is in the box. If a detail is missing, such as whether a control head is included, that is a question for the seller or the maker's page. For more on control heads, see autopilot control head options.

Why a core pack omits the drive

The drive unit is the part that physically moves your boat's steering. It interfaces with the steering system to keep you on course. Drive types include linear drives, rotary drives, hydraulic pumps, and tiller drives, each suited to different steering systems. Learn more about autopilot drive types.

A core pack omits the drive because the drive must match your boat's steering. If you have hydraulic steering, you need a hydraulic pump. If you have mechanical cable steering, you need a linear or rotary drive. If you have a tiller-steered sailboat, you need a tiller drive. Choosing the drive separately lets you match it to your boat.

You might already have a drive from an older autopilot that you plan to keep. In that case, a core pack lets you upgrade the electronics without replacing the drive. The maker's page will tell you whether your existing drive is compatible with the new core pack.

Core pack versus complete pack

A complete autopilot pack includes both the electronics and the drive. It is a ready-to-install system for a specific steering type. A core pack leaves the drive out, so you have more flexibility but also more decisions to make. Compare complete autopilot packs with core packs.

Complete packs are convenient because everything is matched by the maker. Core packs are useful when you already have a drive or when you want to choose a drive from a different source. The trade-off is that you must verify compatibility yourself.

On this site, the filters for 'drive in the box' and 'control head in the box' help you compare listings on stated details. A core pack will show 'no drive' in the listing, while a complete pack will name the drive type included.

Who should choose a core pack

A core pack suits boat owners who already have a compatible drive, whether from an existing autopilot or as a separate purchase. It also suits those who want to match the drive precisely to their steering system, such as a specific hydraulic pump size or a tiller drive for a small sailboat.

If you are starting from scratch and do not have a drive, a complete pack may be simpler. But if you are replacing an old autopilot and the drive is still in good condition, a core pack can save you from buying a new drive.

For steer-by-wire systems, the autopilot may not need a traditional drive at all. In that case, a core pack that includes the electronics and control head might be the right choice, with the steering interface handled by the boat's electronic helm system. See steer-by-wire autopilots for more.

Reading a core pack listing

When you look at a core pack listing, read the bullet list to see exactly what is included. Look for the course computer or ACU, the heading sensor, and the control head. If the listing says 'w/o GHC' or similar, it means the control head is not included.

The title may name the model line, such as 'Raymarine EV-200' or 'Furuno NavPilot 300'. The part number will tell you the exact configuration. If a detail is missing, such as whether cables are included, ask the seller or check the maker's page.

Remember that a core pack does not include the drive. If you need a drive, you will have to buy one separately. The listing will not state a drive type because there is none.

Questions to ask before buying

Before you order a core pack, ask yourself: What steering type does my boat have? Do I already have a drive that is compatible? Does the core pack include a control head? What network connections does it use?

The maker's page is the source for compatibility and installation details. If you are unsure about your steering system, consult a qualified installer or an authorized dealer. They can help you choose the right drive and ensure the system is installed correctly.

Also consider the network. Many autopilots use NMEA 2000 to communicate with chartplotters and other instruments. The NMEA 2000 standard describes a network for interconnecting marine electronics, so check that your core pack is compatible with your existing network. Learn about NMEA 2000 connectivity.

What to pick for your situation

Questions

What is an autopilot core pack?

A core pack is a partial autopilot system that includes the essential electronics: the course computer or actuator control unit, the heading sensor, and often a control head. It does not include the drive unit that moves the steering.

Why would I buy a core pack instead of a complete pack?

You might already have a compatible drive, or you want to choose a drive that matches your boat's steering system precisely. A core pack gives you flexibility but requires you to verify compatibility.

Does a core pack include a control head?

It depends on the listing. Some core packs include a control head, others do not. Read the bullet list or the title for terms like 'w/o GHC' to know what is included.

Can I use a core pack with my existing drive?

Possibly, if the drive is compatible with the core pack's electronics. Check the maker's page for compatibility information. If you are unsure, ask a qualified installer or an authorized dealer.

What is the difference between a core pack and a complete pack?

A complete pack includes the drive unit, so it is a ready-to-install system for a specific steering type. A core pack omits the drive, so you must select one separately based on your boat's steering.