Electrical Systems Built for the Marine Environment
Marine electrical systems operate in conditions that demand considerably more than conventional electrical installation. Moisture, salt, vibration, restricted spaces, continuous movement and high electrical loads all influence how equipment must be selected, installed and protected.
Our work covers the inspection, fault-finding, repair, installation and upgrading of onboard AC and DC electrical systems. This can range from diagnosing an intermittent electrical fault through to stripping out ageing installations and producing a complete new electrical system around the operational requirements of the vessel.
Services include:
- complete and partial vessel rewires
- AC and DC distribution systems
- switchboards and distribution panels
- fault-finding and electrical diagnostics
- batteries and battery-bank installations
- battery monitoring and management
- alternators and charging systems
- battery chargers and inverter/chargers
- shore-power systems
- isolation and galvanic protection
- circuit protection, fusing and breakers
- navigation and deck lighting
- pumps, motors and auxiliary electrical equipment
- cable replacement, routing and termination
- electrical system inspection, testing and documentation
Proper electrical installation requires consideration of conductor sizing, voltage drop, circuit protection, cable routing, environmental protection and the separation of AC, DC and sensitive electronic systems. These principles form a substantial part of the BMEEA Code of Practice used within our electrical work.
Marine Electronics and System Integration
Modern vessels increasingly rely on electrical and electronic systems operating together rather than as isolated pieces of equipment.
Eyemouth Marine can install, integrate and troubleshoot marine electronics including navigation, communications and onboard monitoring equipment, with work informed by recognised NMEA installation practices.
This can include:
- multifunction displays and instrumentation
- GPS and navigation equipment
- VHF systems
- AIS
- radar
- transducers and depth equipment
- antennas and coaxial installations
- NMEA 0183 interfaces
- NMEA 2000 networks
- Ethernet and data networks
- electronic monitoring equipment
- equipment power supplies and distribution
- fault-finding between interconnected systems
The NMEA 0400 standard places particular emphasis on achieving reliable equipment operation through correct installation, data integrity and control of unwanted electrical and electromagnetic interference.
Equipment location, cable routing, suitable power supplies, grounding and separation between different cable groups can all materially affect the performance of modern onboard electronics. The BMEEA guidance likewise addresses cable separation, electromagnetic compatibility and the interaction between increasingly interconnected equipment.
Power Generation and Charging
Modern vessels are increasingly dependent on reliable onboard power. Navigation equipment, communications, pumps, lighting, heating and domestic systems all place demands on the electrical system, making effective generation and charging essential.
We can design, install and upgrade battery banks, alternator charging, shore charging, DC-DC charging, solar generation and charge-control systems to suit the vessel’s operational requirements.
Power Distribution and System Integration
Generating power is only part of the system. It also needs to be distributed safely and efficiently throughout the vessel.
Our work includes AC distribution, inverter systems, inverter/chargers, shore-power integration, battery monitoring and integrated multi-source charging systems, bringing different power sources together into a coherent and manageable installation.
Assessment, Protection and Reliability
Before additional equipment is installed, the existing electrical system should be assessed for capacity, conductor size, circuit protection and voltage drop.
This avoids simply adding new loads to systems that may already be operating close to their limits and helps ensure that upgrades are properly matched to the vessel. On commercial vessels and workboats in particular, reliable electrical systems are critical, as faults can lead directly to downtime and lost operating time.
Installation, Testing and Commissioning
Good marine electrical engineering is not finished when the final cable is connected.
New and modified systems should be inspected, tested and commissioned to establish correct operation and identify faults before the vessel returns to service.
Our approach can include system testing, load testing, voltage-drop checks, equipment commissioning, cable and circuit identification, system documentation and operational checks.
NMEA guidance calls for completed installations to be powered, tested for operation and interoperability, checked for software compatibility where applicable, and documented for future servicing.
Clear labelling and documentation also make future maintenance and fault-finding considerably faster, particularly on commercial vessels where systems may be modified repeatedly during their working life.
Qualified Marine Electrical Capability
Our marine electrical capability is supported by recognised industry training through British Marine, the British Marine Electrical & Electronics Association and the National Marine Electronics Association.
Our Marine Electrical Engineer holds the BMEEA Marine Electrical Technician qualification and the NMEA Marine Electronics Installer qualification.
The BMET qualification is based around the BMEEA Code of Practice and the standards governing marine AC and DC installations, providing an industry-recognised framework for safe installation and maintenance of marine electrical systems.
The NMEA qualification demonstrates knowledge of recognised marine-electronics installation practices and the NMEA 0400 Installation Standard, including electrical supply, grounding, equipment installation, data communications and system integration.
These qualifications sit alongside practical vessel experience across workboats, commercial craft, fishing vessels and leisure yachts, including new installations, major rewiring projects, diagnostics and integrated power-system work.
Electrical reliability matters on every vessel, but the consequences of failure are particularly significant for vessels expected to earn, operate or remain available for service.
Eyemouth Marine supports fishing vessels, commercial operators and workboats with planned electrical work, fault diagnosis, system upgrades and refit projects, while providing the same professional capability for leisure craft.
Our wider engineering, fabrication, hydraulics, boatbuilding, composites and slipping capability means electrical work can also be incorporated into larger repair and refit programmes without the vessel owner having to coordinate several separate contractors.
Whether the requirement is a single fault, a navigation upgrade, a new battery and charging system or a complete vessel rewire, the aim is the same: a professional marine electrical installation designed around the vessel, its operating environment and the work it needs to do.
