It is a 422 to USB cable. The chipset in the cable does all work. The green breakout only a cabling interface. Used for 422 to PC connections.
this is the adapter between your AIS
transponder and your PC then your transponder is 422 output.
Now, your Watchmate650 seems 232 input. Check out the images
in my earlier post.
422 does not talk to 232 as a rule
, unless one uses an adapter that translates 422 to 232.
There is a trick shown on the Internet
of how, at times, 422 can be plugged directly into 232, as said this may work, or not. (It did not work for me with Simrad
to PC connection).
You can confirm the above by looking up your AIS transponder manual -4 cables(rx+, rx-, tx+, tx-) is 422, 3 cables
is 232 (tx, rx, gnd).
If my assumptions are correct, then you will want a 422 to 232 adapter.