Simrad A2004 Autopilot Pack, No Drive, HS75 GPS Compass, AC70 Autopilot Computer, RF300 Rudder Feedback, Optically Bonded 4.1 in Display, NMEA 2000
Got questions? Ask an expert!
Know someone who needs this?
Share it with your crew or mechanic.
Overview
The Simrad 000-13901-001 is an A2004 autopilot system kit with an HS75 GNSS compass, supplied as a no-drive package for boats that already have, or plan to add, a compatible steering drive unit.
At the helm, the A2004 controller uses a 4.1-inch optically bonded color LCD with a 170 degree viewing angle, plus a rotary dial and dedicated mode keys for quick course changes and steering mode access. The controller is rated IPX7 for spray and washdowns, and it is specified to operate from -25 to +65 C.
The AC70 course computer handles steering control and system logic, while the RF300 rudder feedback unit provides rudder angle for consistent response. The HS75 adds GNSS-based heading with up to 10 Hz updates and heading accuracy specified to 0.75 degrees, so the autopilot can hold a steady course at low speed and even when the boat is stationary.
Key features
- No-drive system kit: controller, course computer, rudder feedback, and HS75 heading sensor are included; a hydraulic pump or other drive unit is not.
- A2004 helm controller with a 4.1-inch optically bonded color display, 320 x 240 resolution, and a 170 degree viewing angle.
- Rotary dial with an anodized aluminum knob and dedicated keys for steering modes, a configurable WORK mode, and turn patterns.
- No Drift steering mode to compensate for wind and tide and keep the vessel on heading.
- NMEA 2000 certified networking, with NMEA 0183 in/out available for integrating with other onboard systems.
- AC70 course computer supports 12 V or 24 V DC supply for common commercial electrical systems.
- Optional single-thruster control when an AD80 or SD80 interface module is added.
- HS75 GNSS compass supports GPS, GLONASS, BeiDou, Galileo, and QZSS for global coverage.
What's included
- A2004 autopilot controller (helm display and rotary control head)
- AC70 autopilot computer (course computer)
- RF300 rudder feedback unit
- HS75 GNSS compass
- NMEA 2000 cable (15 ft)
Installation and setup
The A2004 controller can be bracket mounted or flush mounted at the helm. The unit measures 177 mm wide by 115 mm high and is about 56 mm deep; with the bracket installed, allow up to 204.8 mm width and 124.5 mm height for clearance.
Mount the AC70 course computer in a dry, protected space where you can access steering drive wiring and the rudder feedback connection. Leave service loops on cabling and protect all penetrations and connectors from chafe and moisture.
Compatibility and fit
This kit is aimed at non-IMO professional vessels and similar boats that want the A2004 style of controller and steering logic. Because it is supplied without a drive, you will still need a compatible drive unit for your steering system, such as a reversible hydraulic pump or non-isolated solenoid valve control, matched to your cylinder size and steering layout.
Rudder feedback is included, so the system fits installations where you can mount a feedback arm at the rudder stock or steering linkage. For low-speed maneuvering with thruster assistance, the system supports a single thruster when paired with an AD80 or SD80 interface module.
Electrical and network integration
The A2004 controller and HS75 compass connect to an NMEA 2000 backbone using Micro-C connections, so plan for a properly powered backbone with terminators and an available tee for each device. The controller can be powered from the NMEA 2000 network, while the AC70 course computer uses a dedicated 12 V or 24 V DC supply.
For navigation steering, the autopilot can take route and guidance data from compatible onboard navigation equipment over the network. Mount the HS75 where it has a clear view of the sky and a stable platform to get the most consistent heading performance.
Use on board
This setup is a strong fit for workboats, commercial fishing vessels, and passenger boats where the helmsman wants a rotary interface that is quick to operate in rough conditions. It also fits refits replacing older professional autopilots, especially when adding GNSS heading to improve course keeping in wind and tide.
Maintenance and care
After heavy weather or washdowns, rinse salt residue from the helm controller and wipe the screen with a soft, damp cloth. Periodically check NMEA 2000 connectors, the rudder feedback linkage, and the course computer wiring for looseness or corrosion, especially in high-vibration installations.
Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.
Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.
Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.
Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.
Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.
Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.
To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.
We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.