I just bought a cabin mount VHF radio with an internal GPS receiver (for a sailboat, not the TI). This radio has DSC and AIS receive both of which need the GPS to work.
I didnt look but I imagine that handheld VHF radios are available with DSC and the internal GPS. I dont know much about PLB but it seems that a hand held VHF radio that has an integrated GPS receiver for the DSC function would cover whatever PLB does (??) plus you can also use it for standard communication. The hand held radio likely has a much shorter range of the signal working. I think PLB uses satellite but.. were talking about using it on a TI.
The link talks about DSC.
https://www.jamestowndistributors.com/u ... docId=1110