Yes, I would install the transducer specific to the GPS/Chartplotter/Sounder. The reason you don't want to try and use a transducer with an unknown heritage is that you can't be sure what the signal out format is. Airmar sells much the same transducer with several different electronic configuration, even though the physical configuration is almost identical.
For instance, the DST800 Triducer
(speed, depth, temp) is made in four different configurations for Furuno, Raymarine, and TackTick. If you had the TackTick one, and bought a Furuno display head, chances are pretty good that it would fail to work.
SD, I'm thinking of getting a GPS-Sounder combo, would you say it's better to install a new transducer specific for the GPS? and get rid of the old one?
Since I'm not sure I will go with the GPS, just a stand alone depth sounder made sense to me initially, but by what you said I think it's better to use transducers specific to system/brand.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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