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Author Topic:   Garmin GPS 172C sonar
lemar posted 09-11-2008 06:03 AM ET (US)   Profile for lemar   Send Email to lemar  
HI, I am new to this site but maybe someone can help me??

I have just bought a Garmin GPS 172C and I wish to buy the sonar for it so I could use it as a fishfinder, however I could not locate this anywhere, can someone help? Thanks. Pierre

jimh posted 09-11-2008 09:10 AM ET (US)     Profile for jimh  Send Email to jimh     
The GARMIN GPS 172C has been discontinued. The SONAR accessory for it is the GARMIN GSD 20 Remote Sounder. That product has also been discontinued. You likely will have to look for a retailer with some old stock to locate a source for these. For help in locating retail outlets selling marine electronics I suggest you try

jimh posted 09-11-2008 09:11 AM ET (US)     Profile for jimh  Send Email to jimh     
Following my own suggestion, I located hundreds of retailers offering the GARMIN GSD 20 using this search: btnG=Search+Products

Bella con23 posted 09-11-2008 09:12 AM ET (US)     Profile for Bella con23  Send Email to Bella con23     
The Garmin 172c was sold as a GPS plotter with sonar capabilities utilizing the separately sold Garmin GSD-20(black box).

I made that mistake when I was shopping for my Garmin GPS/Fishfinder some years ago. I originally purchased the 172c and discovered it was not a fishfinder until you added the $400 GDS-20 and transducer.

I quickly upgraded the 172c for the all inclusive 178c and have been using it as my GPS since.

I have a separate fishfinder and would suggest you do the same unless you don't have the room.

lemar posted 09-12-2008 01:03 AM ET (US)     Profile for lemar  Send Email to lemar     
Thanks for all the help, as suggested it would be better if I purchase a stand alone fish finder. Any suggestions please? I am situated in Malta therefore I will be fishing in salty water.

Thanks again regards


jimh posted 09-12-2008 07:18 AM ET (US)     Profile for jimh  Send Email to jimh     
Buy this refurbished GARMIN GSD 20 Remote Sounder for only $130: channelid=FROOG

lemar posted 09-14-2008 04:26 AM ET (US)     Profile for lemar  Send Email to lemar     
Thanks again I will check for shipping cost as from US to Malta it will cost over 150 USD plus I would need to pay Tax. Ideally I will try to find the same product from somewhere in EU like UK as the shipping cost would be cheaper and I need not have to pay tax. This site is great and the people on it are very helpful.


SuburbanBoy posted 09-14-2008 09:47 AM ET (US)     Profile for SuburbanBoy  Send Email to SuburbanBoy     
This helps to illustrate a problem that many have had with Garmin products. They do not try hard enough to help consumers differentiate between their products. They do not make it clear that to convert a chartplotter to a sounder you must purchase an expensive part (GSD xx analog sounder) in addition to the transducer. There is no other option. These are sophisticated products, and they are not easy to describe to potential consumers. Inspecting Garmin’s competitors at the local Cabella’s, they (the competitors) have not mastered this process either. Incidentally, Cabella’s counter help was fairly well informed, and very willing to assist. They had to call Garmin to answer my questions about multi-beam, multi-frequency transducers, and the need for a GSD box. It is still unclear to me what the best combination is for fresh water vs. salt water, what is the sonar output wattage of various transducers, or what is the reason for different cone angles for the beam emissions?

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