Page 32 - Practical Ship Design

Introduction, Methods and Data 3

HPlRINE VEHICLES

HYDROSTATIC HYOROOYNAHIC
SUPPORT SUPPORT

SINGLE TUIN
HULL HULL
I
1 AMPHIBIOUS HOVERCRAFT I CATAHARM PLMING HULL

I 1
I SIDEYALL HOVERCRAFT 1 SEHI-SUBHERSIBLE HYDROFOIL

1 - I u d
I OISPLACEHENT SHIP I SUATH

SUBHARINE

Fig. 1.1. Marine vehicle types.

The extremes of amphibious hovercraft and submarines have unique capabilities;
the former has an ability to travel over land or ice as well as over the sea; the latter
an ability to travel under ice flows and to remain invisible.
Many other types of marine vehicles share their market place, to a greater or less
extent, with the choice between them being determined by the required speed and
carrying capacity together with the wind and sea conditions in which they are
required to operate. The building and operational costs which these factors entail
for the alternative types of vessel determines the “winner”.
Apart from some discussion in Chapter 2 - in which the importance of setting
objectives in broad terms which admit unconventional solutions and a brief
treatment later in that chapter of planing and multi-hull vessels - this book is
devoted to monohull displacement ships. The great majority of ships sailing the
seas today are monohull displacement ships, with this solution having been shown