On NWD we have 4212 Garmins which are networked with the Garmin native network cable. We also bought a Digital Yacht transceiver in 2019 (the AIT1500 I think - its a 2W transmitter). Since then, they have an upgraded models which are class B+ 5W. It has always worked well. I don't have experience with the splitter; we installed a dedicated antenna. We went with a wifi connection as there are more available gateways with wifi compared to bluetooth.
We also use a computer/tablet for navigation, and have NMEA 2000 and 0183 devices. We chose the Rose Point Nemo gateway to connect it all together. The Nemo takes in all data and provides it back out to any devices that need it. For example, we could chose to use the Garmins to provide course data to our autopilot, or our computer (or tablet) navigation software. The Nemo also has a ethernet out for a wired connection. We added a household wifi router, and use the router to connect both the wired computer and the wireless devices. Using the wifi router ensures we can stay connected anywhere on the boat reliably. I can have nav info sent/received by my android phone and tablet (which I don't really take advantage of) and my Surface, which I do use on the flybridge. We mounted our router inside a closet just forward of our main electical bay under the lower helm, so far no issues with not having a "marine router".
We picked a household router which uses a 12v DC adapter, and bought the correct pigtail for our router, and wired it into the boats 12v DC system.
The AIS in your link does broadcast the AIS data on wifi, but does not integrate the rest of your NMEA data.
Our system was expensive. We went with the Nemo as it could integrate both old and new NMEA formats, our autopilot is 0183 and we have other devices on the boat which are 2000. It has multiple ports for the NMEA 0183, as we had two radios and the autopilot which are all NMEA. It has an ethernet port, allowing computer networking for sending / receiving data. The Nemo is $700, plus the cost of a separate wifi router. Our system has been bulletproof. The only NMEA/GPS issues I've had since the installation were related to a Garmin GPS antenna having poor connection, which required me to switch GPS data sources. I run off the Digital Yacht AIS exclusively now, because I feel it is more accurate.
Digital Yacht makes the Navlink Blue, which takes NMEA 2000 and broadcasts bluetooth. It does not take in NMEA 0183. Its around $300.
Digital Yacht also makes the Navlink 2, which takes NMEA 2000 data and transmits it on WIFI. It is only $290, but like the Navlink Blue doesn't incorporate NMEA 0183. Kind of depends on what you have for NMEA devices you want to interconnect. The Nemo is convenient for me, as the software I use allows me to select which GPS device I'm using for the system, for example. So I have GPS signals coming in from the AIS (it has its own GPS antenna) and one from each Garmin. If for some reason I have an issue with one, I can switch to another easily, and that provides the current trusted data to all devices.
I do find it helpful to have the AIS targets plot on the Garmin chart plotter. When using radar or radar overlay, you'll find your AIS targets aligning (if everything it working right!) with their radar targets. The Garmin also displays the target name and speed, although it truncates long names. You can access a list of targets, but I rarely do it - I tend to look at the Garmin to watch radar targets, and the AIS display on it helps inform course issues with any AIS targets. You can highlight a target using the round cursor key, but I find it incredibly fiddly to use that. If I need better info, such as a full boat name, I can check it easier on my nav software. Garmin only displays AIS targets in one color (green, and red for danger targets.) Fortunately I can change the color of AIS targets in the nav software, so I can have both devices have similar looks.
I'm saving up to move into the touchscreen world!
Good luck!
