Why Your Marine Electronics Fail Early (and How to Extend Their Life)

Replacing a chartplotter or autopilot head can cost hundreds of euros — and for older Raymarine, Furuno, or B&G models, replacements may no longer be manufactured at all. Understanding why these instruments fail early can help you avoid an expensive and sometimes impossible replacement.

The Main Causes of Premature Failure

1. UV Degradation

Constant sun exposure causes plastic housings to become brittle and discolored, and LCD screens to lose contrast or develop dead pixels over time. This is one of the most common — and most preventable — causes of instrument failure.

2. Saltwater Ingress

Even "waterproof" instruments aren't immune to long-term salt exposure. Salt crystals work into seams, buttons, and connectors, gradually causing corrosion that leads to unresponsive buttons or display flickering.

3. Thermal Cycling

Repeated heating during the day and cooling at night causes materials to expand and contract, which can loosen seals and create micro-cracks where moisture enters.

How to Extend Instrument Lifespan

• Cover instruments with a UV-resistant suncover whenever the boat is moored or stored.
• Rinse with fresh water regularly, especially after rough conditions.
• Inspect seals and gaskets annually for cracking.
• Avoid covering instruments while still hot from direct sun, which can trap condensation.