Different Types Of Ships Research Articles

MIDCMAS: An Identification Design and Control Package Applied to Marine Systems

Abstract This paper presents and integrated software package for multivariable identification, design and control of marine systems, which has been developed for educational as well as for research purposes. The package architecture and the underlying design philosophy are illustrated together with a number of examples of identification and control of different types of ships from sea trials and from simulation experiments.

Hours at work at sea: watchkeeping schedules, circadian rhythms and efficiency.

Abstract This review is concerned with the hours of work of personnel engaged in watchkeeping duties on board ocean-going vessels plying between distant ports. After an introduction to the general problem, existing research findings are considered in the context of the degree of adjustment shown by physiological and performance rhythms to the various watchkeeping systems in use on different types of ship. The findings are discussed in relation to a proposed programme of research aimed at determining the optimal system for maintaining efficiency in crews operating the modern, fully automated vessels now coming into service.

A Survey of Marine Traffic in the Southern North Sea

Over the past few years several papers have been written based on the results of surveys of marine traffic in different parts of the world. The general knowledge of the overall picture of the behaviour of ships at sea has increased considerably but there are still many aspects which need to be explored. One of the main fields of interest of the Marine Traffic Research Unit at the City of London Polytechnic is the use that mariners make of available sea room. For any particular area the navigational difficulties are going to vary considerably in situations where ships enter the area at different points, travelling indifferent directions, from situations in which the ships tend to keep to a number of defined routes through the area. If ships do tend to adopt a routing structure through an area, the next question of interest is how wide the various routes are, given no physical limitations for their width. The behaviour patterns may vary for different types of ship, and speed is another variable which may affect the situation. Answers to all these questions would be needed if one wanted to analyse the efficiency and safety aspects of marine traffic in an area.

Canaanite Maritime Involvement in the Second Millennium B. C.

Professor Sasson traces the history of Cananite shipping. Since there is little documentation before the Late Bronze Age, little is known about the means of trade used by the Canaanites pre Bronze Age, but according to Professor Sasson, there is evidence that the Canaanites ruled the sea in the second millennium. Professor Sasson discusses the different types of ships built by the Canaanites and how they were used by them.

Über eine Methode zur Eichung desship-borne wave recorder

Simultaneous wave measurements were made in coastal waters with three instruments; an accelerometer buoy and two ship-borne wave recorders mounted at different depths on two different types of ship. A comparison was made between the wave energies obtained and calibration curves were prepared for both ship-borne wave recorders to allow for the falling off in response at high frequencies. These show that the effective depth to be used in the exponential term is much bigger than the actual depth. In the experiment described here the values were found to be 2.25 d and 3.0 d.

Standard Marine electrical installations

The requirements of merchant and naval installations are cited in brief. The rules of the classification societies are reviewed and present practise is fully discussed. Then follows the specific applications to a number of different types of ships including both merchant and naval vessels. The reasons for the application of electric propulsion to a battleship are briefly given.

Standard Marine Electrical Installations

The requirements of merchant and naval installations are cited in brief. The rules of the classification societies are reviewed and present practise is fully discussed. Then follow the specific applications to a number of different types of ships. including both merchant and naval vessels. The reasons for the application of electric propulsion to a battleship are briefly given.

Notes

IN the House of Commons on Tuesday, Mr. Goschen announced that a committee of experts would be appointed to inquire into the efficiency of water-tube boilers in actual operation in different types of ships of H.M. Navy.