This presentation will focus on the topic of the Apparent Center of Gravity in a rigid body and that would be an introduction to the Apparent Center of Gravity in ocean going vessels. The subtopics of this presentation consist of Why this is important in Shipping?, What is a Rigid Body, The Center of Gravity in the Rigid Body, Mass, Volume, Density & Weight in the Rigid Body, Partially Submerged Rigid Body, Buoyant Force in the Rigid Body, Reduced Mass of The Rigid Body, New Weight of the Rigid Body, Apparent Center Of Gravity in the Rigid Body, New Weight, Mass and Density of the Rigid Body, Reduced & Added Mass of the Rigid Body, and Added Weight of the Rigid Body.