Saltwater/Fresh water Transducers?

[spudz]

Picked up a Lowrance Elite 4 HDI, that I intend upon using between 2 kayaks for ocean fishing. Plan on picking up an additional transducer so that I can swap out the monitor/battery between the two kayaks and not worry about having to swap out the transducer.

Sent Lowrance an e-mail about which transducer (model #) do I need to purchase to run on the Elite 4 HDI:

From: Lowrance Products
Sent: Tuesday, October 21, 2014 8:03 AM
To: Eddie
Subject: Re: Form data from "ContactFormLowranceGeneral" (Lowrance) [#375863]


Thank you for your inquiry.
We have 2 transducers, one for fresh water which is part# 000-10976-001 and one for salt water which is part# 000-10977-001. Both can be purchased from store.navico.com.

Thank you for choosing Navico products!
Navico Technical Support


I may be asking silly questions, But I’d like to know if anyone would enlighten me about the difference between a saltwater and fresh water transducer? I’ve sent Lowrance an email inquiring about the difference between the two in addition to my questions below – awaiting their response. I didn’t know there is a saltwater & fresh water transducer. I fish saltwater, what happens if I use a freshwater transducer in saltwater? Which transducer is included with the Elite 4 HDI? I don’t recall anywhere on the box indicating a fresh water/salt water model.

Thanks in advance!
Eddie