Marine NavigationAustralia · 2026

Projects & Installation

Refits, wiring, sensor siting, commissioning and the documentation that makes a boat troubleshootable.

4 guides27 min of reading
A network diagram showing a trunk cable with a terminator at each end, four device drops for display, AIS, wind and autopilot, and a power injection point. TERM TERM MFDAISWINDPILOT 12 V IN NMEA 2000 BACKBONE
A backbone with exactly two terminators, short drops to each device, and one power injection point.
A network diagram showing a trunk cable with a terminator at each end, four device drops for display, AIS, wind and autopilot, and a power injection point. TERM TERM MFDAISWINDPILOT 12 V IN NMEA 2000 BACKBONE

refit

Marine electronics refit guide

A refit is a systems-engineering job, not a shopping list. The biggest mistake is replacing equipment before understanding what the existing equipment does.

Projects & Installation7 min read

Read the guide A wiring diagram showing a 12 volt battery, a fuse, positive and negative conductors running to a display, the round-trip run length dimensioned, and a maximum permitted voltage drop of 0.36 volts. 12V fuse round-trip run −0.36 V max (3%) VOLTAGE DROP

power

DC power for marine electronics

New electronics on poor wiring are still unreliable electronics. Most mysterious marine equipment faults are power faults wearing a costume.

Projects & Installation7 min read

Read the guide A sailing yacht profile with labelled positions for the masthead wind, VHF and radar, the GNSS antenna, the heading sensor near the centre of motion, and the hull transducer. wind · VHF · radarGNSS antenna heading sensortransducer SENSOR SITING

installation

Sensor siting and installation

Sensor position directly determines sensor performance. A convenient location is very often a poor location, and no display can fix it afterwards.

Projects & Installation7 min read

Read the guide A glass helm showing a chart on the main multifunction display with soundings and a vessel symbol, a wind instrument dial, and an autopilot head holding 040 degrees. 1219824 SOG 6.4DPT 12.4 WIND 040° PILOT · AUTO MFD · INSTRUMENTS · PILOT

commissioning

Commissioning and sea trials

A refit is not complete when the display turns on. Commissioning is where calibration, source selection and alarm configuration turn boxes into a system you can trust.

Projects & Installation6 min read

Read the guide

Other topics

The library is organised so each shelf answers a different kind of question.

FoundationsEquipment & SensorsBuying GuidesBy Vessel TypeSeamanship & SafetyReference