+1 for an iPad. We did an Atlantic crossing and extensive Caribbean, Bahama’s and US east coast cruising as well as Europe: France, Biscay, Portugal, Maroc, Canaries, Cabo Verde, Suriname.
equipment connected
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GPS - Furuno GP32 - position, COG, SOG and other “NMEA-sentences” like waypoint and accuracy
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Depth Sounder - Navman Multi - depth output
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Speed log - Navman Multi - speed output
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Autopilot - Raymarine ST4000+ compass data, wind input and waypoints input
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Pactor modem - position input
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SSB - Icom - position input for distress
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Wind - Autonnic (UK) - cheap but HQ windmeter, speed and direction - no display just NMEA-out
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VHF - Standard Horizon - position input for distress
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AIS transceiver - WOW, I can’t even begin to tell what valuable data comes out of this device
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Apple iPad without GPS!
All these “marine” instruments delivered data and took data from one box that’s called a “multiplexer”. The multiplexer broadcasted anything (receiving or transmitting) anything you’d like to an iPad or a PC for openCPN
The instruments were of different brands and they did not even have the same NMEA output in common. The autopilot for example only communicated in “SeaTalk”. Nevertheless, one simple multiplexer combined all those instruments AND broadcasted the data thru WiFi! Super simple setup (to me). Worked flawlessly for more than 4 years. Yes, I had a spare multiplexer and will use that unused box on the Nonsuch to “build” the same network from basically “any old quality marine sensor with a data output that still works”. I can not think of a more cheap way to build an navigation network that does it all.
The multiplexer with WiFi option I used was a Dutch design called “Shipmodul Miniplex” but I’ve seen other brands make a similar product with the same or better specs.
The iPad software (app) I used was iSailor and yes I would use it again. They became less-popular overnight because they cancelled the promised “lifetime free chart updates” but still, it is THE package to use when you want to integrate NMEA sentences received with WiFi. Also, their charts rule (imho). You can display any of the supplied sensors in the iPad screen.
If iSailor starts to bug you, just switch to Navionics or one of the other great apps. Choice is yours! OpenCPN on an old Panasonic Toughbook will also do a great job with the same setup. Come to think of it, you don’t even have to switch… Just run another app from the same iPad or PC.
About the iPad, I used an iPad 2 and also an iPad 3 and experimented with iPad Air and Air2. IMO the iPad2 (yes the old one… no idea how long it will be supported) was by far the most desirable device. The screen is bright enough in full sunlight but it does NOT draw as much current as the Retina screen of the iPad3. iPad Air devices have a plastic screen in stead of the iPad2 glass screen. On paper it may be better (read: cheaper to make) but in real life, no.
Also, do not try to save bucks on a cover. We used the NUUD lifeproof covers. Not cheap but they are gooood. A way to charge them while you use them is definitely a must.
I had 2 “multiplexers” on board and 2 iPads -ready to go- just as a backup. Further more, I did have a Toughbook with navigation software and maps, also just for backup. Never had to use any of the backups. The iPad in a NUUD case has proved to be a winner.
Hope any of this makes sense to non-tech folks. I’m more than happy to explain if you have any questions.
mark, n36#25, nld