Setting alarms
The volume of data generated by a connected system can be overwhelming, so you need quick and easy ways of sifting it for information that is mission critical. First of all, spend time with your new MFD or data display to customise the pages of information that you want to look at. Set up a page that combines your new engine data, for example, alongside boat speed. Another one could focus on wind angles and VMG, with a third with relevant GPS information — bearing and range to the next waypoint, plus boat speed and speed over the ground.
Next, set up alarms that will warn you of a potentially dangerous situation. Every manufacturer does this in a slightly different way. Almost every parameter can be given a trigger value, and you can then decide how that alarm is presented. Does it sound an alert that you have to clear? That could be useful for an elevated engine temperature, shallow depth or when the true wind gusts above your normal reefing point. Perhaps just a warning on screen is necessary when the battery voltage drops below 50% or if you lose GPS connectivity for a second. Apps can be just as good with alarms if you pick the right one. Nmearemote, for instance, is very flexible and lets you determine exactly how it notifies you of any given situation. Remember that electronics are no more than an aid to good seamanship. After the novelty of your new MFD has subsided, there’s still the same need to carry a hand-bearing compass, keep an eye on fuel levels and conduct regular engine checks. It’s also worth maintaining a secondary, separate GPS system — perhaps keeping your old unit and maintaining the old NMEA wiring in place, albeit unattached, so that you could quickly hook it up to your instruments in an emergency.