(
DoD) The study of the sea, embracing and integrating all knowledge pertaining to the sea and its physical boundaries, the chemistry and physics of seawater, and marine biology. From a military perspective, oceanography includes basic oceanography plus the study of bathymetry, hydrography, geophysics, astrometry and precise time; supported by ocean engineering, operational supercomputing, and operations research.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.