Never underestimate the power of the ocean. Big waves are dangerous, but rip currents (rip tides), a strong current of out-going water from the beach, kept me busy during my life guarding days. Here are a couple of aerial photographs showing some big rips that I shot yesterday in Venice beach. The difference in water color makes the rip easy to see from the air. Unfortunately, rips are not as obvious from the ground.
See more photos here