Physical Oceanography : General features of the ocean. Early exploration and historical review. Conservation laws - equation governing the ocean flow field. Approximate forms of basic equations - f - plane and a - planeapproximation, shallow water approximation, vertically integrated form of the measurement of physical properties of ocean water and their distribution in world oceans; Ocean currents - Geostrophic Current and Ekman WindDrift Current; Ocean Current Estimation; Current measurements,