I am looking at getting the 899ci HD for my boat this spring. The unit ships with a compact transducer with the following specs 200/83/455 kHz, 20/60/180 degrees However the 899 is capable of using the High Def transducer with these specs 200/83/455/800 kHz, 20/60/180 degrees. My question to the gurus on this site is should i take advantage of humminbirds Transducer swap program and send back the standard ducer and upgrade to the High Deff for an extra 85 bucks? or will i not notice a difference.
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