Understanding how tides work isn’t just a key part of fishing, it’s a key part of boating at large. Knowing how the water levels will change and what conditions will be present will help you to be a better boater. Captain Keith shows you how to read and understand a tide chart. | MarineMax

There’s more to the ocean than meets the eye. Internal tides — underwater tides caused by the Moon’s gravitational pull — may only appear a few inches high but can extend hundreds of feet below the water’s surface, where they play a role in moving heat through our climate system. | NASA Earth