Navionics should be an important part to every anglers tackle box. It works best when you have a large water you need to cover like lakes, reseviours, and the sea. Most of the time fish will be stuck to structure this could be anything. For example depth changes will hold fish. Navionics has a setting called sonar chart this will show you the depth changes and the shapes of the bottom. This can show you where the predators will be holding up out of the current waiting for baifish behind underwater mountains, sat in crevaces etc etc.
accompanied to this they have the relief shading setting. this really benefits sea anglers as it shows rocks, sandbanks and drops. In the photo below you can see the structure. This can make finding marks an absolute breeze and should be one of the first things you reach for when searching for marks.
Hopefully you can see the importance of navionics for finding marks and actively searching for fish. Paired up with a fish finder, sidescan or livescope system and you are on for a winner! crucial on the reservoirs
hope you enjoyed this read and its showed how important and how much of a bargain you can get by using navionics.