SatFish uses custom bathymetry maps to give you a detailed view of the seafloor. Every canyon, ledge, pinnacle, and seamount is easy to find on our shaded-relief maps. Shallow waters are pale blue, turning to darker blue and purple as the seafloor gets deeper. You can even see “textured” hardbottom and rocky reef areas next to smooth, flat sand or mud bottoms. These underwater features provide important habitat for baitfish and gamefish alike. In the open ocean, pinnacles and seamounts also create areas of upwelling where currents push to the surface, bringing vital nutrients, plankton, and life with them.
We include major depth contours to highlight steep drop-offs and shallow flats. The closer the contour lines are to each other, the steeper the dropoff. Our primary contour lines follow the 100-, 500-, 1000-, 1500-, and 2000-fathom depths, with additional contours on zoomed-in regions. Some species tend to associate with certain depths and underwater features, so viewing our detailed bottom maps and contours right with the temperature and chlorophyll maps can help you target productive waters when they move over these important depth zones.
We also have thousands of the best fishing spots labeled on our charts. These aren’t some random lists of coordinates scraped from the internet – these are the legit, real-deal spots carefully curated by our team of local experts. Combined with continuous GPS coordinate display wherever you tap or move your cursor, it’s easy to find your favorite hot spots on our map and clearly see when that temperature edge or color break has pushed into your zone.