Integrated navigation systems are everywhere these days, thanks to the ability of individual components to link together to create networks where information and commands can be exchanged via cable or even wireless networks. While an onboard network can link a wide variety of equipment including engine sensors, load cells, closed circuit television and even entertainment, integrated navigation systems focus on what can be seen as those components most vital to safety and control.
Typically these will include some or all of the following: GPS chartplotter, sonar / echo sounder / fishfinder, AIS, VHF radio, performance instrumentation, radar, autopilot and the multi-function displays.
However at its most basic an integrated navigation system can be just a single display with the necessary systems built-in to analyse and display the data from, for example, a sonar transducer, GPS antenna and electronic cartography card. These simple systems are ideal for small boats or craft such as RIBS with limited dash space where there is room only for a single display, but the owner requires a variety of navigational aids. Other users like the fact that they can have the option of fitting a single large display rather than several smaller ones. This is particularly advantageous when one particular graphical function, such as the chartplotter, is active most of the time, but still leaves the option to view another function in detail if needed. Split screen options can allow two to run side by side if needed.
It is on larger boats, however, that the advantage can be really marked. Instrument repeaters, where information from one instrument is also shown on a sub-display in another location, have been around for many years. However with an integrated navigation system all the information available can not only be viewed but also controlled from any of the displays. For a small motorboat this might involve having multi-function displays on both the flybridge and the main steering position. For a larger sailing boat the network could link the helm, chart table and skipper’s cabin.
Another advantage is the fact that the installation is greatly simplified, with a single backbone cable carrying both the power and information, with junctions used to connect displays and transducers and antennae.
There are still many reasons why owners may choose to opt for individual items of navigation equipment, but integrated navigation systems offer an economical and versatile alternative for boats of every size.
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