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NMEA 183.x is a serial flow system. You cannot "T" off from one brand device to another. You will need a "multi-plexer" junction box that will accept all the various output NMEA feeds from the various instruments and then "order" the signals in a serial flow and output them back to the various devices. Some brands of instruments are compatible with each other and some are not, so there may be an opportunity to "sub-link" of the systems but eventually they will need to feed a multiplexer junction box to get true 2-way signal feed around the system.
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