Derek noted the Vexilar Edge and that is a great unit. There are advantages to going with a separate GPS and fishfinder and the Edge coupled with a Lowrance GlobalMap 4800 would be a great set up for anyone.
Quote:
Dang, that 178c looks sweet!
Is an external antenea advantageous at all
if your only fishing inland lakes?
And what are dual frequencies used for?
An external GPS antenna is needed if there might be interference, something obstructing the GPS satellite signal. If you have an open fishing boat and plan to mount the unit on a console, you should be fine. If you run a tiller, just be sure that the sides of the boat don’t interfere with the GPS signal. Otherwise, get the external antenna.
Dual frequency…
Most fishfinders operate at about 200khz, which is considered optimal by most manufacturers. Most dual frequency units offer 50khz as a secondary frequency. It is not necessary for fishing inland lakes but has some benefits, including a wider view of what’s below the boat. However, with the wider view you also get more noise and a lesser detailed image on the screen.
The Vexilar Edge is quite original and basically in a class by itself in that it offer TRUE dual frequency presentation, meaning that it actually comes with TWO SEPARATE transducers, one operating at about 400khz and the other at about 107khz. The Edge provides both data sets on the screen, side-by-side for a highly detailed veiw of what lies beneath.
For those who do not want to spend $700 on a fishfinder there are plenty of great options out there. For fishing inland lakes a single frequency unit will do you just fine and a guy can get a decent unit for a couple hundred bucks.
Back to sorting my tackle box…