Looking to build a low power boat computer/electric network on my boat
 
The whole setup has to work off 12v and use both 4g data SIM or Wi-Fi
 
Navigation computers with backup. Small PC with openCPN and LCD screen and external GPS aril
An android tablet with Navionics with built in GPS
 
A DIY AIS would be good
 
Wi-Fi hub and rooter with external 4G data Arial. Network attacked storage unit for backup.
 
Directional external Wi-Fi areal
 
Hidden GPS tracking device
 
lpo4 battery management with solar/charger data logging vie wire and Wi-Fi/Bluetooth.
 
Sound system for living and driving with USB storage and Bluetooth
 
Wi-Fi/USB sonar with logging.
 
Waterproof external security camera 4K and internal IP security camera. These will be used for video blogging.
 
VHF radio with external aril.
 
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I already have most of these things as discreet tools the idea is to rebuild from scratch as a network using cheap off the shelves bits and open source as much as possible.

 

A link on the subject https://bareboat-necessities.github.io/my-bareboat/#_not_so_good