You should learn how a fish finder works before choosing one Fish Finders use sonar technology to find fish-or any other solid object-beneath the surface of the water...

The modern combination Fishfinder GPS receiver is an amazing piece of technology Nothing is more disappointing for the fisherman than going out on the water and not knowing where to fish...

So you are looking for a portable fishfinder Not a problem when you use the Humminbird 535...

The Humminbird Fishfinder 585 is an excellent tool It combines the use of sonar and a high resolution screen to give you a very good idea what is below you...