YouSail category guide
What this category is and what it does aboard a sailing boat
The Navigation, Electronics & Communications category groups the instruments, sensors, displays, networking and radios that let a skipper determine position, plan and follow a track, avoid collisions, monitor the boat’s environment and communicate with other vessels and shore. It includes primary navigation hardware such as chartplotters and GPS/GNSS receivers; situational awareness sensors like radar, AIS and depth sounders; systems that automate steering and data handling such as autopilots and instrument networks; and communications gear from VHF radios to long-range options. Also covered are the wiring, mounting, displays and integration components that make the whole system usable on a yacht.
Where and how this equipment is used
These items are used throughout the boat: at the helm for real-time navigation and collision avoidance, at the nav station or chart table for passage planning, in the cockpit or flybridge for monitoring, and near the mast or on deck for sensors. Radios and emergency communications remain critical anywhere onboard. Many components run continuously while sailing, so reliability, power consumption and thermal and moisture management matter.
Main product types and what is excluded
- Chartplotters & navigation displays: integrated screens that show electronic charts, routes and navigation data.
- GNSS/GPS receivers and antennas: provide position fixes and timing.
- Radar: ranging and bearing information for collision avoidance and landfall detection in poor visibility.
- AIS (Automatic Identification System): transceivers and receivers for vessel traffic data.
- Depth, speed and wind sensors: transducers and instruments for local environment sensing.
- Autopilots and steering drives: systems that steer the boat automatically or assist the helmsman.
- VHF radios (including DSC): short-range voice and distress communication.
- Long-range communications: HF, SSB, satellite messengers and satcoms for offshore comms (hardware sold here, not airtime).
- Networks, multiplexers and interfaces: NMEA 0183/2000, Ethernet switches and gateways that integrate data flows.
Excluded from this category are unrelated electrical systems (e.g. domestic audio or propulsion control) unless they specifically integrate with navigation or communications networks.
Why the choice matters
Navigation and comms equipment directly affect safety, passage efficiency and the mental workload of the skipper and crew. The right setup improves situational awareness in traffic or limited visibility, reduces fatigue through reliable autopilot steering, and ensures the boat can call for help when needed. Conversely, poor integration, incompatible voltages or insufficient redundancy can create confusing displays, false alarms or total loss of critical capability when it matters most.
Who needs what
Not every boat requires every item. A day-sailer will usually be comfortable with a compact chartplotter, depth sounder and a basic VHF. Coastal cruisers benefit from AIS, better plotter charts, and a robust VHF with DSC. Offshore sailors should expect at least one reliable long-range communication option, independent position sources (multiple GNSS/antennas), radar and redundant systems or power sources. Racing boats favour lightweight, trimmed-back displays and precise sensors with minimal wiring weight, while liveaboard vessels prioritise integrated networks, larger displays and reliable autopilot performance.
Unfamiliar terms, explained
- GNSS – Global navigation satellite systems (GPS, GLONASS, Galileo etc.), the combined term for satellite positioning services.
- AIS class A/B – Transceivers that broadcast vessel identity and receive others. Class A is required for commercial ships and transmits more frequently; class B suits recreational craft.
- DSC – Digital Selective Calling, a protocol for initiating distress calls from VHF with an MMSI identifier.
- NMEA 0183 / NMEA 2000 – Industry-standard data protocols for exchanging sensor and instrument data aboard boats.