Final answer:
Amphidromic systems in oceanography are characterized by standing waves resulting from tidal forces, usually found in various ocean locations including coastal areas, where water particles follow a circular pattern as waves pass.
Step-by-step explanation:
Rotary wave amphidromic systems in oceanography are characterized by standing waves that result due to the effects of the Coriolis force, causing the tide to rotate around a point of no tidal amplitude known as an amphidromic point.
These systems result from tidal forces and are associated with the movement of water due to the gravitational pull of the moon and the sun, as well as the rotation of the Earth.
Amphidromic systems are not specifically equatorial; they occur in various places around the globe, including coastal areas. In these systems, the water particles follow a roughly circular path as the wave crest and trough pass, which is a characteristic motion of surface water waves in the ocean, often depicted as a sinusoidal wave pattern.