Autopilot System · Autopilot & Bridge Systems
B&G NAC-3 is a autopilot system. It is installed on the bridge and connected to the vessel's steering, heading and navigation interfaces appropriate to the system. Its purpose is to support bridge watchkeeping or automatic steering according to the function identified by the category. The exact sensors, control algorithms, alarms and steering interfaces depend on the installed model and vessel configuration. The exact model designation identifies the control architecture and connected functions; capabilities and limits must be confirmed from approved system documentation.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
What our service work and the manufacturer documentation say about keeping this model running.
Verify valid heading and navigation inputs and compare commanded behavior with actual vessel response using approved test procedures. Inspect bridge controls, alarms, power supplies and data interfaces for faults or loose connections. Function-test changeover between automatic and manual steering where applicable and confirm that loss of input produces the expected alarm or fallback behavior. For watch-alarm systems, test reset devices and alarm escalation according to the vessel procedure. Back up configuration before approved software or hardware changes. Refer to manufacturer and bridge-system documentation for exact adjustment, test and commissioning procedures.
Keep fuses, control switches, selected interface or power-supply modules and manufacturer-recommended electronic spares. For critical steering interfaces, replacement control units or sensors may be part of the vessel's strategic spare plan. Preserve approved software and configuration data.
Free of charge — send us your request for B&G equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, B&G first.
Tell us what you need for this B&G NAC-3 — a part, a service call, a second opinion. Are you B&G? Claim this brand page.
Service engineer? Write the day report for this NAC-3 in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.