The ship (or vessel) may be described as a floating box made of steel in such a manner that it can safely travel in water in most weather conditions when carrying her load or empty. The front end of the ship which facilitates forward movement is called bow and her rear end which may be blunter, rounded or squared off is called the stern. The flat roof over the ship’s hull (body) is known as the deck which may have one or more openings called hatches. Below the hatches are holds or cargo spaces. The stern is fitted with the rudder which provides steering control and the propeller or screw which rotates at great speed to drive the ship. There are two types of Vessels (a) Sea or Ocean-going vessels: Usually have more than 5000 MT Gross Tonnage and are mechanically self-propelled Vessels of Steel Constructions. They are required to be “Classes” with any of the internationally recognized IACS-Member Classification Societies. (b) Sundry or Coastal Vessels are smaller crafts generally of local origin, built of steel, wood or fibre-glass, which is not subject to classification generally. If classes it would be a better risk. Normally used in inland, coastal waters, rivers, lakes or within Port waters.