Speed capable transducer ?

[Blind Bobber]

I just took delivery of a new Garmin 160C color fish finder I got on Ebay for $179 . Owners manual says I need a "Speed sensor transducer" to get speed. How can a transducer get speed readings? I don't understand technology I guess. My Humminbird had the paddle wheel. That made sense to me. At any rate I cannot seem to locate this item. Not on line nor does Garmin book give any info on this item. A part number would be helpful. Can anyone direct me on this or give more info? I think it will be a good unit or atleast better than the Eagle I was lookin at. Thanks much.
BLIND BOBBER:cool:

[fishkisser]

Is this it ???
https://buy.garmin.com/shop/shop.do?pID=538

[Blind Bobber]

Wow! tFishkisser thanks for the link. The transducer my unit came with is a dual beam 200khz/80khz. The unit you linked me to is a single beam but all else is right. I could not find the speed, temp depth transducer with dual beam on the Garmin web site. Seems like I should be able to. At $108 that is alot of dollars. Who might have this locally and is there a market for my never used dual beam Garmin transducer? Thanks again. You folks are amazing.
BLIND BOBBER:cool:

[sarg88]

call rogers on marine drive by pdx. they are knowledgable and helpfull.

[Highmark]

The one you are needed is there. I just found it

HM

Is this it ???
https://buy.garmin.com/shop/shop.do?pID=538

[5 Salt]

Check out Airmar Technology Corp. They are the transducer manfacturer for most Fishfinder (Garmin, etc..) producers.

Airmar's P66 (transom) or B744V (thru-hull) models are compatible with Garmin, offering Speed/Temp/Depth w/ 50/200 kHz @ 600w Very nice unit that will a significant upgrade from OEM transducer

Search on Garmin @ the below link:

http://airmartechnology.com/airmar2005/ex20/RMProducts/DrillDown.asp?Type=FF

[Blind Bobber]

Hats off to you all. I greatly apreciate your help. Now I have some research to do and price shopping.
Thanks again
BLIND BOBBER:cool: