B&G do themselves a disservice with their lack of good technical
documentation.
Refer to Chapter 17 of the operator manual.
Essentially you'll need to configure the
WiFi Access Point on you
B&G Zeus.
Settings->Wireless->Built-In-Hotspot
Once you've done this, take note of the
Network Name (SSID) and
Network Key. Either Settings->Wireless->Connect Your Smartphone/Tablet or Settings->Wireless->HotSpot Settings
Also take note of the IP Address of the Zeus. Settings->Network->NMEA 183->WiFi.
On your PC, connect to the Zeus
WiFi Access Point.
In
OpenCPN goto Settings->Connections.
Add a new network connection.
Select TCP.
Enter the IP address of your Zeus.
Enter 10110 for the port. (FYI, Port 10110 is the default port number for
NMEA 183 over TCP/IP).
Good luck.