One of the most important tools an angler should rely on to catch more and bigger fish are marine electronics or "fishfinders". Most anglers use these devices to stay off the rocks while travelling and to know the depth that they’re fishing but often forget that today’s marine electronics offer other pieces of valuable information. These units show important details that we sometimes disregard such as water temperature, boat speed, bottom hardness (rock, sand, mud), variations in the bottom (ditches, bars, saddles, humps), vegetation, and baitfish. It’s important for anglers to pay attention to all of these details to find out where the fish are situated in any given body of water. Keeping a journal of this information can save a lot of time when trying to figure out where the fish are. In addition some units are equipped with GPS (global positioning systems) and lake charts that can aid in navigation and keep you safe on the water!