The power required to propel a new ship is subject to a formidable number of variable items. The family tree of power for propulsion (Fig. 1) shows these divided into two main groups. One is concerned with the resistance to motion caused by the interaction of the hull of the ship with the surrounding water

Before studying in detail the various technical branches of naval architecture it is important to define chapters. The purpose of this chapter is to explain these terms and to familiarise the reader with them. In the first place the dimensions by which the size of a ship is measured will be considered; they are referred to as 'principal

The general approach Earlier Parts have given a broad picture of the economic environment within which marine transport operates, and the mechanics of making economic calculations. Ship design links the two, i.e., the marine transport requirements must be developed into a series of feasible ship designs

A naval architect asked to design a ship may receive his instructions in a form ranging from such simple requ ents as \an oil tanker to carry 100 000 tons deadweight at 15 knot nots\to a fully detailed specification of precisely planned requirements. He is usually required to prepare design for a vessel that must carry certain

Taking a brand new ship to sea for the first time is naturally quite an event after so many months of preparation and hard work, and the prevailing spirit is one of cheerful optimism, especially if the hopes of good weather have materialized. As soon as the trials party is assembled on board, the pilot, who has probably been waiting in the wheelhouse for some time, orders the gangway

Structural design After having established the principal dimensions form, and general arrangement of the ship, the designer undertakes the problem of providing a structure capable of withstanding the forces which may be imposed upon it The hull of steel merchant ship is a complex structure, unique in the field of engineering structures in that it is primarily plate structure

Components The strength deck, bottom, and side shell of a ship act as a box girder in resisting bending and other loads imposed on the structure. The main deck, bottom, and side shell also form a tight envelope to withstand the sea locally. The remaining structure contributes either directly to these

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