Mobile yacht electrical & marine electronics in Istria
Marine electrics and navigation electronics for 30 to 85 ft sailboats, catamarans and motor yachts: berth-side diagnostics, charging systems and shore power. Work is carried out afloat, at the berth, without haul-out.
DC systems, batteries & charging
Bank capacity, charging sources and distribution are one system, and a fault in one shows up as a symptom in another. Banks are load-tested before anything is quoted, and cable is sized for the actual load and run length rather than assumed.
- AGM & lead-acid bank service
- Inverter-charger installation
- Alternator & DC-DC charging
- Busbar, fusing & cable sizing
- Custom DC breaker panels
- Battery monitoring & shunts
Marine electronics & instruments
Installation, integration and fault-finding across the major marine electronics brands — Raymarine, Garmin, Simrad, B&G and Furuno. A reported display failure is usually a network, power or termination fault, and that is ruled out before any unit is replaced. Autopilot commissioning has its own page.
- Chartplotters & multifunction displays
- Radar & AIS transponders
- Depth, speed & wind instruments
- Instrument network fault-finding
- VHF, DSC & antenna checks
Shore power, 230 V AC & fault-finding
Marina trips, earth faults and voltage drop. AC circuits are measured under load with the shore lead connected, which is the only condition in which most of these faults appear.
- 230 V shore power & isolation
- RCD tripping diagnosis
- Galvanic isolation & corrosion
- Earth-fault & voltage-drop tracing
- Bilge pump & float switch circuits
- Panel rebuild & circuit labelling
Watermaker electrical & controls
A watermaker presents the largest step load on most vessels, and most reported failures are electrical rather than hydraulic. Supply, starting current and control circuits are measured while the unit runs — membranes and pump hydraulics are not serviced.
- HP pump supply & load budgeting
- Starting inrush current analysis
- Control board & relay diagnostics
- Salinity sensor & diverter valve circuits
- Fresh-water flush system wiring
- Pressure & flow safety switches
Passarelle, gangway & tender systems
Remote-controlled passarelles, gangways and tender garage doors fail on their control side far more often than mechanically. Receivers, relays, limit switches and interlocks are proven end to end, on the electrical side — hydraulic pump rebuilds and structural metalwork are not carried out.
- Remote control receivers & handsets
- Relay sequencing & control logic
- Limit & proximity switch faults
- Electric lock & release solenoids
- Tender garage & hatch interlocks
- Emergency manual override testing
Underwater & architectural lighting
Underwater fittings are cooled by the water they sit in, so a light that dims on the hard and works afloat is protection operating rather than a fault. Drivers, supply and volt drop across the run aft are measured at the fitting, afloat and under load.
- Thru-hull & surface-mount fittings
- Constant-current driver replacement
- Volt drop on transom runs
- Bonding, isolation & corrosion
- Switching, dimming & colour control
- Thermal cutout diagnosis
Autopilot commissioning & calibration
Autolearn tunes rudder response, not heading — a pilot holding a steady but wrong course has a deviation or alignment problem no amount of autolearn will fix. Drive limits, feedback and polarity are set alongside; the compass swing and response tuning need a sea trial.
- Dockside commissioning & rudder limits
- Rudder feedback alignment & polarity
- Heading sensor alignment
- Compass deviation swing
- Response tuning & sea trial
- Sensor siting & interference
Fault-finding sequence
The same sequence used on commercial vessels: measure, record, then act on the readings.
Symptoms by message
Vessel, berth and what fails. Photos of the panel help — most calls are triaged before arrival.
Berth-side diagnostic
Measured at the pontoon: voltage drop under load, insulation resistance, thermal check, network topology.
Written plan & price
Parts list, hours and the reasoning. Nothing is ordered or opened further without approval.
Work, test, document
Terminations torqued and labelled, results recorded, photo record and readings sent on completion.
DC systems, electronics, shore power, watermakers and boarding gear
DC systems & charging
Bank sizing and testing, inverter-chargers, alternator and DC-DC charging, distribution and fusing.
/dc-systems-charging Read the detail →Marine electronics
Display, radar and AIS installation, transducer work and instrument network fault-finding.
/marine-electronics-installation Read the detail →Shore power & 230 V
Isolation transformers, RCD tripping, galvanic isolation and earth-fault tracing.
/shore-power-230v Read the detail →Watermaker electrical & controls
Supply and starting current for the high-pressure pump, control board, salinity probe and flush circuits. Electrical scope; membranes and pump hydraulics are not serviced.
/watermaker-desalination Read the detail →Passarelle & gangway controls
Remote-controlled passarelles and gangways: receivers and handsets, control boards, limit switches, solenoids and tender garage interlocks. Electrical scope; hydraulic rams and structural work are not carried out.
/passarelle-gangway-controls Read the detail →Underwater LED lighting
Thru-hull and surface-mount fittings, constant-current drivers, volt drop across transom runs, bonding and isolation, switching and colour control.
/underwater-led-lighting Read the detail →Autopilot calibration
Dockside drive and rudder-limit setup, feedback alignment and polarity, heading sensor alignment, compass deviation swing and sea-trial response tuning.
/autopilot-calibration Read the detail →Faults reported most often
Send the symptom, vessel type and berth. You get a written assessment of the likely cause and whether a visit is needed.
- Shore power keeps tripping the marina RCD
- House bank flat by 03:00 at anchor
- Chartplotter loses radar or AIS intermittently
- Alternator not charging the house bank
- Instruments drop out when the engine starts
- Autopilot wanders or refuses to engage
- Inverter alarms under galley load
- Bilge pump running with no water aboard
- Watermaker trips the inverter on start
Berth-side annual electrical inspection
A planned check of the whole electrical installation, carried out afloat at the berth over a single attendance. Booked ahead of the season rather than called out against a fault.
The inspection reports what was measured. It is not a survey, and it does not certify the vessel to any scheme.
- AC & DC distribution Every distribution board opened, terminations checked for heat and movement, and circuits confirmed against their labelling.
- RCD trip testing Residual current devices tested for trip current and trip time, rather than pressed and assumed working.
- Insulation resistance Measured per circuit, so a bank of readings taken this year can be compared against next year’s.
- Thermal imaging High-current switchboard connections, busbars and terminations scanned under load — a joint on its way out runs hot long before it trips, and a scan taken cold shows nothing.
- Bank condition Battery bank tested under load and per block, with the figures recorded against each block rather than the bank as a whole.
- Shore power & earthing Inlet, lead and the safety-earth path checked with the vessel connected, including galvanic isolation where fitted.
- Written inspection record Readings, photographs and a defect list with priorities, handed over as a document you keep.
Request a berth-side diagnostic
Send vessel, berth and fault symptoms. Attendance across Istria and the Gulf of Trieste is scheduled by arrangement once the fault has been assessed.