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As ships move through ice their propellers are exposed to significant ice loads causing damage to the blades and other parts of the propulsion system. A new method is presented to numerically evaluate ice loads on propeller screws. This method is based on the new phenomenological model of the interaction of the blade with ice.

Theoretical techniques including strip slender body and free beam theories with hydrodynamic and stability analysis are used to examine motion in waves (surge heave pitch sway roll yaw) vertical plane stability and dynamic wave loading of SWATH (small-waterplane-area twin-hulled) ships. Predictions from the theory are compared with available experimental results from model tests. Validity of the analytical methods is discussed.

Existing methods to compute wave torsional moment and its transfer function for large opening ships are summarised. The statistical values of wave torsional moments in irregular waves are predicted from wave spectral models and differences are discussed. It is concluded that wave period has more effect on statistical values than wave height and that predictions made with the Pierson- Moskowitz spectral methods are more conservative than those of the ITTC spectral method.

Welfare and safety on ships is examined from the design perspective. Specific work hazards are identified. The impact of the physical environment upon humans and hazards due to incorrect decisions is discussed. Suggested protective measures highlighted for further investigation include consideration of government regulations investment projects and specific engineering design areas.

Modification and conversion (lengthening engine rebate) of five Maesk E Class multipurpose ships for use under the US Navy Maritime Prepositioning Ship Concept has necessitate a new propeller design to overcome a high-frequency propeller-induced vibration source. The development and selection of an optimum propeller are described. Full-scale trials on the completed installation are reported.

An industry based research and development project headed by Det Norske Veritas and involving major companies in the field has examined the future needs of refrigerated cargo ship trades and presented technical solutions for new generation reefer ships including: slimline hull design with minimum bow flare and narrow superstructure; twin screw propulsion powered by medium speed diesels; alternative sideloading pallet handling systems featuring folding jib cranes serviced by conventional or paternoster loaders; gratingless air distribution system with brine/ammonia cooling; prefabricated fittings and advanced integrated ship control.

One of the most important questions related to ship collision namely external mechanics of collision is investigated. A theoretical analysis of the motion of the colliding vessels during collision is summarised in order to evaluate the amount of kinetic energy lost during impact. Different factors affecting kinetic energy loss during collision including angle of encounter location of impact masses and speeds of colliding vessels surrounding water effect shock effects and friction at the surface of the ships are analysed.

The Safety Guide makes recommendations for practices to be adopted by terminal personnel to ensure safety in operations relating to the handling of ships carrying liquefied gases in bulk. The guide is primarily intended for LP terminals, but is also applicable for use by terminals handling LNG and liquefied gases.

The lifting of sanctions in post apartheid South Africa has had both positive and negative effects on ships agents. The function of Ships Agency in South Africa is vastly different to that performed in other parts of the world. One of the greatest challenges facing the ships agency industry in South Africa is the ability to maintain high standards. The implementation of ISO 9002 is discussed. Liner and non-liner activity is compared.

These guidance notes deal with ships intended for the carriage in bulk of dangerous liquids, i.e. liquids in normal temperature and pressure conditions, solids carried in a molten state and gas carried in liquefied state under pressure and/or cooled. Sections examine general requirements, lay-out of the ship in the cargo tank area, cargo compartments, cargo systems, miscellaneous systems, particular installations, gas detection and measuring instruments, control and monitoring, and fire fighting equipment.

This book examines the introduction of nonindigenous species through ballast water operations. it assesses current national and international approaches to the problem and makes recommendations for US government agencies, the US maritime industry, and the member states of the IMO.

The background and design aspects of the suggested management and treatment techniques for ballast water are reviewed as well as many of the ballast water and related design and operational concepts that have been developed from ship design and experience over many years. Suggested designs to be considered in the design phase of new ships to minimise the build up of sediments and to allow the range of management and treatment options to be designed and used at the highest level of efficiency are presented.

A short review of Taguchi's method is given and the concepts - quality loss function signal-to-noise ratio robustness - used in the design of ships are discussed. Uncontrollable influences include port costs in time and money loss of speed caused by fouling and weather cost of fuel machinery investment interest rate and the freight rate. Decision variables (control factors) include propulsion power cargo capacity and speed. Orthogonal arrays are designed and the influence of variations in control factors on the design is shown.

The view is expressed that it is only a matter of time before a major incident on a modern well found cruise ship or ferry with significant loss of life occurs. The reasons for this belief are examined. Firstly some brief introductory information is provided. Next the likely scenario for an incident levels of compensation criminal proceedings and corporate recovery are each outlined in turn. After this reasons why disaster is more likely now are given. Ship construction is touched upon followed by a look at training and real life emergencies. Lastly consideration of the heart of the problem is given.

Aspects of the design and operation of new coal fired ships is discussed including - methods for burning coal in boilers (coal slurry and pulverised coal firing briefly considered mechanical stokers and fluidised bed combustion system; storage and handling of bunker (compartments hoppers mechanical and pneumatic conveying systems); safety hazards; risk of explosion and fire from methane gas coal dust suspended in air and spontaneous combustion; hazard control methods and classification society requirements; economics.

The contents of the book are arranged in two sections - 'Tonnage' and 'Freeboard'. The former includes Gross Tonnage, Net Tonnage (including under Suez Canal rules), French and Italian tonnage, Under-deck tonnage, and sections on how to calculate gross and net tonnage. The section on Freeboard includes the load line, deck line, assigning and determining freeboard, rules for deck erections in sailing ships, turret-deck vessels, shelter-deck steamers and part awning-decked vessels with raised quarter decks.

Although there are plenty of opportunities both domestically and internationally facing a small but well-trained commercially and technically skilled Australian flag shipping industry the prospects for the future are bleak. Industrial problems of the past and the unsuitable industrial structure inherited from Britain are outlined but they are not the current problem. The high cost and fairly inefficient ports through which vessels must pass and the subsidised competition from road and rail limit growth of coastal trades. Internationally there is competition from untaxed and largely unregulated ships operating out of tax havens. Only the government can remove these handicaps to the Australian shipping industry.

Lecture paper given by author in Trondheim on January 8th, 1970. It deals with the technical development of steam turbine plants by using statistical information (mainly relating to ships powered by STAL-LAVAL AP turbines). This covers machinery, systems and plant and control and instrumentation. It then goes on to look at operating characteristics and experience (with regard to performance and mechanical behaviour). Then the service provisions that need to be made in order to establish and maintain good performance and function are examined. Finally, some general views regarding the further development are put forward.

The book contains the proceedings of the International Conference on Hydroelasticity in Marine Technology held at Trondheim, Norway, 25-27 May, 1994. Papers on the topics of: risers, risers cables and pipelines, ships, slamming and whipping of ships, springing of ships, flexible containers, skirt and bag systems, floating airports and large floating structures. An important application that is dealt with is the behaviour of rigid and flexible risers on floating production platforms. The effect of oscillatory fluid motion and current are studied. Vortex-induced vibrations is one area of concern. Similar problems arise for cables and pipelines. Impact loads due to waves (slamming) are considered both for conventional and high-speed vessels. Both global hydroelastic effects (called whipping) and local ones are studied. The local hydroelastic effects due to slamming are most pronounced for wetdeck slamming. The global steady state hydroelastic oscillations of ships and Tension Leg Platforms (TLPs) are called springing and are dealt with in the proceedings. The importance of springing for ships increases with increasing speed and/or increasing ship length. Similar problems are of concern for very large floating structures like floating airports. Hydroelastic behaviour of membrane type structures like the seal bag system of a Surface Effect Ship (SES) or flexible containers is another important topic in the proceedings.

Ice manoeuvrability characteristics are presented and compared for those ships fitted with traditional propulsor-rudder arrangements and those fitted with podded propulsors. The comparison covers the whole range of ice thicknesses relevant for ship navigation. The characteristics are obtained by calculations based on an earlier developed numerical model that allow calculation of ice forces and the ice moment applied to a vessel sailing along a curvilinear path.