Wifi repeater to tablet PC
AIS and GPS NMEA data from AIS/GPS receiver can be send out to an tablet or iPad via WiFi (over UDP or TCP).
The following link shows the network settings in OpenCPN.
OpenCPN Networking / repeater to tablet PCs
Quark-elec QK-A023 receiver works like an AP broadcasts AIS messages through WiFi to nearby mobile terminals. Detail:QK-A023 AIS receiver