humminbird 788ci fishfinder
This will allow you use the high frequency, 200 kHz, which is used to read wide areas in shallow water. You can also get details from the bottom. The lowest frequency, 50 kHz will allow you to probe depths with ease.
Most combo sounders can detect water temperatures. This information is very useful when trying to find out if you're riding on a current channel in open waters. Fisherman use slight temperature variations to find areas of water that could hold large pelagic animals like marlin.
Many of the newer chartplotter-fishfinder units can display AIS targets if they are connected to a receiver. This information is typically transmitted back and forth over a NMEA0183-HS network. This network is 38400 baud, and it is not compatible or slower than the 4800 baud NMEA 10183 system.
Another benefit of GPS fishfinder combos is that they are waterproof. These units come with an IPX7 rating for water resistance but no Ethernet connectivity. Choose a water-resistant unit if you are going to be outside in the rain, or swimming in extremely deep waters. Water-resistant units make up the majority of good quality. The unit's rain and depth resistance ratings will impact its quality.
The combination chartplotter-fishfinder unit provides powerboaters, sailors, fisherman, and marine electronics professionals with many advantages over buying a separate chartplotter sounder.
A fish finder chartplotter combo allows you to fish anywhere, from shallow to deep waters. The dual frequency technology means that you can fish from different depths with greater chances of finding fish. The best part is that they let you save your fishing locations so you won't need to hunt them down again. To save fishing places, you can use a combination fish finder chartplotter/phone to integrate it with your phone.
Before purchasing any chartplotter fishfinder combination unit, you should also consider cartography. A certain brand of chart card may be available for trade or you might already have it. You will get the best sounder information and, more importantly, fishfinder data from your combo.