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The benefits and current limitations of using a Computational Fluid Dynamic (CFD) package for the modelling of flow through a water-jet duct inlet and hull system are assessed. A representative water-jet duct was modelled and validated using data obtained from wind tunnel experiments. The influence of pitch and yaw on the flow into and through the inlet duct was also studied. The influence of a simple hull shape on the flow through the water jet inlet was modelled. It was shown that it is possible to model the water-jet system to obtain practical design information. Improvements are still required for modelling complex three-dimensional shapes in order to allow rapid parametric studies.

New mid-range engines from Sulzer include the RTA48T and RTA58T designs with long piston strokes for use in tankers and bulkers. MAN B&W's S46MC will not be available until 1997. Wartsila's 38 medium speed diesel engine has been chosen for Carnival Cruise Line's Fantasy class but Sulzer's long-awaited ZA50S will be introduced in 1996 for use in both cruise ships and ferries. MAN B&W's Holeby division has developed the L16/24 heavy fuel burning engine which will eventually replace the 230mm and 280mm models. Fast light weight ferries are an attractive market for engine manufacturers including MTU Ruston and Caterpillar. Aero-engine derived gas turbines now propel commercial ferries with unit powers ranging from Allied Signal's 3000kW TF40 and General Electric's 4400kW LM500 to the Turbo Power / Mitsubishi 24250 MFT8 and GE's 26000 LM2500.

Experimental results of sailing yacht testing in the towing tank of the Laboratory for Ship and Marine Hydrodynamics (LSMH) of the National Technical University of Athens are presented. The performance of a 1:4 scaled model of a 50ft sailing yacht in calm water was evaluated. Experimental results referring to the drag side force dynamic centre of gravity rise and dynamic trim for a set of displacements are presented. Performance was predicted using the Gimcrack coefficients and the IMS (International Measurement System) Velocity Prediction Program (VPP).

The fast seagoing 18m pilot vessel MS Voyager propelled by two waterjets hull constructed from aluminium and deckhouse constructed from specially developed composite materials is described. Full scale tests of the design have been carried out. Assessments were made of mechanical vibrations fatigue of construction members due to transient loading speed and manoeuvring characteristics and the vessel's motion in the seaway. Ship motions calculations were carried out and the range of reliability of the strip theory method for high vessel speeds was determined. Special attention has been given to the effect of lengthening of the vessel on slamming phenomena and acceleration levels.

The P&I system of mutual non-profit making clubs providing indemnity insurance to shipowners and charterers for third party legal liabilities arising from the operation of their ships is described: an overview of typical claim types (cargo personal injury damage to third party property collision pollution) and their respective financial implication is included. The role of the expert in the legal processes inherent in this system can change from adviser to witness and is examined with reference to a typical cargo claim and to Mr Justice Cresswell's definition of the duties and responsibilities of an Expert Witness. The adaptation of P&I clubs to perceived future demands is considered with discussed with attention to sources of expertise and the impact of electronic data interchange and working practise. P&I clubs

A series of articles including: Gas turbine fantasy? which considers the possibility of future cruise liners being powered by gas turbo-electric plant. Fire safety strategy on passenger vessels which discusses the functions and advantages of safety management as an integral part of a passenger vessel's complete fire safety system. Onboard loading and damage control which describes a new onboard loading calculator and damage control program developed specifically for passenger vessels by the University of Southampton's Wolfson Unit. Coping with the hazards of galley fires which describes the Telsyn 301 hand portable fire extinguisher developed by Maritime Progress Ltd. Sailing 'posh' with P&O Cruises which charts a brief history and examines the continuing good fortunes of a world leader in the cruise liner industry.

The primary aim of the present study is to propose an innovative method for assessing the safety of ships which have suffered accidental or in service damage. Only a small number of possible scenarios for accidental or in service damage representing all possible damage scenarios are selected using a sampling technique in which random variables affecting the damage are probabilistically characterized. A damage index for the corresponding damage scenario is defined as a function of damage characteristics such as location and extent of the damage. The residual strength performance of a ship with the corresponding damage scenario can then be calculated by analytical or numerical methods. Once this process has been carried out for each of the damage scenarios selected, a diagram relating the residual strength performance to the damage index can be established. This diagram will be very useful for a first-cut assessment of a ship's safety immediately after it has suffered structural damage. The diagram can also be used for to determine acceptance criteria for a ship's safety against accidental or in service damage. An applied example is shown to demonstrate the applicability of the proposed method in terms of developing a diagram between the ultimate longitudinal strength versus grounding damage index for four types of double-hull oil tankers - VLCC, Suezmax, Aframax and Panamax

Proceedings of a conference held on 30 April 1998 Session 1 - The Current Situation Debate and Discussion N B Mortensen, 'Bulk Carrier Saefty - The View and Role of an Industry Organisation' F Plaza, 'IMO's Work on Safety of Bulk Carriers, An Update' Tor-Chr. Mathiesen, 'Safety of New and Existing Bulk Carriers IACS Studies and Conclusions' I Williams, 'Bulk Carriers Safety - The Regulatory Perspective' J Isbester, 'The Concerns of Mariners' Session 2 - Existing Vessels Eur. Ing. R D Tustin, 'Existing Bulk Carrier Safety, On the Evaluation of Corrugated Watertight Bulkhead and Double Bottom Structure of Existing Single Side Skin Bulk Carriers with the Foremost Hold Flooded' C P Gardiner and R E Melchers, 'Aspects of Bulk Carrier Hold Corrosion' S Ballantyne, 'Innovative Self Discharging Bulk Carriers for the Gulf of Carpentaria' Session 3 - Bulkhead and Hatch Cover Strength J K Paik, 'The Strength and Reliability of Transverse Bulkheads and Hull Structure of Bulk Carriers' Prof. P Grundy and A Geiro, 'Ultimate Strength Limit State Assessment of Transverse Bulkheads' R C T Rainey et al. 'Failure of Bulk Carrier Bulkheads After Flooding' D Byrne and J Evans, 'Hatch Covers: Failures on Laden Bulk Carriers in Heavy Weather With Reference to Current Design Practice' Session 4 - Longitudinal Strength E Andreassen, 'Development of Ultimate Hull Girder Capacity' Dr G Armstrong, 'Bulk Carrier Ballast System Design for Flow Through Exchange of Ballast Water' I T Braidwood et al. 'Bulk Carrier Structural Integrity: Predicting Fatigue Life with Inluence Functions' Session 5 - Double Hulk Oil Carriers Dr W Fricke and R Nagel, 'Technical and Economical Benefits from Double Side Skin Bulk Carriers' Prof. C D Jand and G Y Joon, 'Optimum Structural Design of Double Hull Bulk Carriers' David Anderson, 'Summary Report of Discussion'