Quote Originally Posted by jaxsprat View Post
I have seen it posted on several sites that ONLY the HDS8 & 10's will be able to do the SI thing with a additional transducer and adapter. Not any of smaller units. May be worth looking into further before buying.
I think they are going to call it "side view"....neverless, it is available on all HDS models. 3rd paragraph...

Lowrance Announces Side-Viewing Sonar Option for New High Definition Systems | Lowrance