Page 33 - Practical Ship Design
P. 33

4                                                               Chapter 1
                                                  \
                                                    COWBIRED 011 AND STORES x
                                                        STORES
                                                    ILEET
                                                    PLEEt TANKERS







                                                                 LANDING snips DOCK
                                                                   AIRCRAFT CARRIER6
                                                                      SIlBlURIwES








                             v
                                                    OREOCERS
                                                    ICEBREAKERS

                                            L.P.G.



                                 Fig. 1.2. Main ship types and their purposes.





              to provide the most economical answer to the majority of  design requirements.
              Some challenges to this supremacy may, however, be on the way: wave-piercing
              catamarans are becoming competitive for passenger ships and the excellent sea-
              keeping ability of the SWATH type of vessel enables a ship of this configuration to
              be smaller than a competing monohull so that this type may become economically
              competitive for a service in which minimum motions in a seaway are a prime need
              - aircraft carriers and some research ships being distinct possibilities.
                Monohull displacement ships can be divided into many categories, some of the
              principal divisions by use being shown in Fig.  1.2. From a design point of view
              there is, however, an alternative classification according to which design require-
              ments are most critical in the determination of the main dimensions of the ship (a
              subject discussed in Chapter 2).
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