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Garmin GT23M-TM vs. Garmin B75M Thru-hull

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Garmin GT23M-TM vs. Garmin B75M Thru-hull

Old 01-15-2020, 07:04 AM
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Default Garmin GT23M-TM vs. Garmin B75M Thru-hull

I am helping a friend with a new Garmin 942xs / GCV20 sounder installation and have a question about his transducer choices.
The plan is to transom-mount both a GT23M and a GT30. I'm just wondering if it would be better to go with a thru-hull mounted B75M instead of the GT23M-TM.
We would still have two transducers but only the GT30 on the transom. The boat is an older 25 Contender.
The B75M is about $500 more than the GT23M-TM - is it worth it?
Opinions?

Old 01-15-2020, 10:49 AM
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The B75M will possibly give better results as speed increase as it is running in cleaner water.
And the B75M is more sensitve than the Traditional CHIRP element of the GT23.

Another option is the Garmin GT15M-IH ....a 600 watt CHIRP in hull.

It all depends on your friends fishing paramaters.
Old 01-15-2020, 01:56 PM
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Thanks Gil, good advice.


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