I need picking your brain and get some ideas…
As you know, we are kicking off our first season aboard a J/80.
We have done the theory… now we need to start collecting real sailing data, to compare with our theoretical and fine tune it. And because we are a bit nerdy.
How do you get that data out?
Veloce runs Raymarine electronics (except for a Velocitek ProStart). All instruments are connected to the Raymarine proprietary Seatalk NG bus and shown on different screens and the plotter Axiom 7.
Data on the bus are Wind angle and speed, Boat speed, Speed over ground, Temperature, Pressure, Heel, Depth, Position.
The Axiom plotter running Raymarine Lighthouses seems capable to only collect a track with position points, no timestamp and intervals to broad for the sort of analysis I am interested in.
What options do we have?
I am collecting data via Sailgrib (connected via WIFI to the instruments, running on a tablet or phone) and SignalK/ Opencpn (on a raspberry pi), wired into the seatalk bus.
But, so far I i have only collected tons of data and never had the time to analyse it. So I can only tell you that those tools collect everything, but don’t know how usable they are.
Most common but very expensive (and very, very good) would be expedition running on a laptop…
One more thing: Remember that Seatalk NG is a NMEA2000 network with different contacts. Thus, all NMEA2000 thungs work just fine!
Thanks Fabian. We are mostly trying to collect data to refine our polars. The raspberry pi option is so far the most interesting. Don’t really know where to start with that though. By the way, what do you collect with sailgrib?
Sailgrib can store all data from the nmea stream (at least that’s what it said). So that’s what I did for a while. Haven’t looked at it yet.
Cool! I’ll try sailgrib, but I need a nmea wifi first…