Intro to Naval Architecture 3 2010 Part 1 pps

[...]... passengers N2 = total number of passengers the ship is permitted to carry In using these formulae: (1) When N1 + N2 is less than 13 , N1 and N2 are to be taken as zero (2) The factor (4T/3D) 2 is not to be taken as greater than unity and the term K 2 V C (4T/3D) 2 is not to be taken as less than 0.25GT (3) NT is not to be less than 0 .30 GT (4) All volumes included in the calculation are measured to the inner... different tonnages merely because they flew different flags It was to remove these anomalies and establish an internationally approved system that the International Convention on Tonnage Measurement of Ships, was adopted in 19 6 91 It came into force in 19 82 and became fully operative in 19 94 The Convention was held under the auspices of the International Maritime Organisation to DEFINITION AND REGULATION 13 . .. generally into line with previous calculations of tonnage Each is determined by a formula Gross tonnage (G7) = 47 V = total volume of all enclosed spaces of the ship in cubic metres k1 = 0.2 + 0.02 log10V Vc = total volume of cargo spaces in cubic metres K2 = 0.2 + 0.02 log10Vc N1 + D = moulded depth amidships in metres T = moulded draught amidships in metres N1 = number of passengers in cabins with not... Convention on Tonnage Measurement of Ships, 19 69 HMSO publication, Miscellaneous No6 (19 70) Cmmd. 433 2, 2 Wilson, E (19 70) The International Conference on Tonnage Measurement of Ships TRINA 3 Ship form calculations It has been seen that the three dimensional hull form can be represented by a series of curves which are the intersections of the hull with three sets of mutually orthogonal planes The naval architect... a great responsibility to the community at large If they fail to live up to the standards expected of them they are likely to be called to account1 Over the years the safety of life and cargo has prompted governments to lay down certain conditions that must be met by ships flying their flag, or using their ports Because shipping is world wide there are also international rules to be obeyed In the case... system for tonnage measurement It provided for the independent calculation of gross and net tonnages and has been discussed in some detail by Wilson2 The two parameters of gross and net tonnage are used Gross tonnage is based on the volume of all enclosed spaces Net tonnage is the volume of the cargo space plus the volume of passenger spaces multiplied by a coefficient to bring it generally into line...This page intentionally left blank 1 Introduction SHIPS Ships are a vital element in the modern world They still carry some 95 per cent of trade In 19 94 there were more than 80 000 ships each with a gross tonnage of 10 0 or more, representing a gross tonnage of over 450 million in total Although aircraft have displaced the transatlantic liners, ships still carry... a wine cask The number of tuns a ship could carry was a measure of its capacity Thus tonnage is a volume measure, not a weight measure, and for many years the standard ton was taken as 10 0 cubic feet Two 'tonnages' are of interest to the international community - one to represent the overall size of a vessel and one to represent its carrying capacity The former can be regarded as a measure of the difficulty... economics As an example, technology now provides the ability to build much larger, faster, ships and these are adopted to gain the economic advantages those features can confer NAVAL ARCHITECTURE Naval architecture is a fascinating and demanding discipline It is fascinating because of the variety of floating structures and the many compromises necessary to achieve the most effective product It is demanding... upon to make sure the ship goes at the intended speed, is sufficiently stable and strong enough to withstand the rigours of the harsh environment in which it moves, and so on The art is in getting a judicious blend of the many factors involved so as to produce a product that is not only aesthetically pleasing but is able to carry out its function with maximum effectiveness, efficiency and economy Naval . published as Naval Architecture for Marine Engineers, 19 75 Reprinted 19 78, 19 81 Second edition published as Muckle's Naval Architecture, 19 87 Third edition 19 96 Reprinted 19 97, 19 99,. Seakeeping 10 0 7 Strength 12 1 8 Resistance 1 73 9 Propulsion 209 10 Manoeuvring 252 11 Vibration, noise and shock 276 12 Ship design 30 4 Appendix: Units, notation and sources 34 7 Index . Britain Contents Preface to the third edition vii Acknowledgements ix 1 Introduction 1 2 Definition and regulation 5 3 Ship form calculations 19 4 Flotation and stability 30 5 The environment 81 6