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Catalogue - Contents |
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Good ship handling is a highly respected skill in the marine world and an important factor in safe navigation. An understanding of the physical principles involved can greatly assist the mariner to become a better ship handler. This series is intended for the practising mariner, outlining the important factors determined from many investigations carried out into the handling of ships. Ship Handling - Part 1
The first film demonstrates the effect of various factors upon the turning characteristics of ships including the effect of shallow water, reduction of speed when turning, directional stability when leaving a turn. Use is made of models, full scale ships and animated diagrams. Ship Handling - Part 2
The second film describes some of the effects which influence the ship during stopping and low speed manoeuvres. The effects are shown in simple terms using both models and full scale ships. Forces generated by the interaction of water flow between the ship’s hull, propeller and rudder combine to produce the net force often called transverse thrust, which affects the ship’s handling characteristics when moving ahead and when moving astern. The film also shows effects experienced when using the hull, propeller and rudder to undertake different slowing and stopping manoeuvres. Ship Handling - Part 3
The third film deals with the effects of wind and waves on a vessel deprived of her propulsive power, i.e. the disabled ship. If a ship becomes disabled, can her drift speed and heading be altered to reduce the risks of grounding? The film considers the aerodynamic effects which cause a vessel to drift in a wind and the hydrodynamic effects which balance them to produce a drift tack and a drift speed. Under certain conditions, for certain ships, a ‘sailing’ effect occurs. Ship Handling in Following Seas - How to Avoid Dangerous Following Seas
It is well known that when a ship is sailing in following or quartering seas its motions can become exaggerated and the dangerous situations that arise can result in capsize. This video uses model experiments and computer simulations to describe these effects and to provide advice on how these dangers can be avoided. Overall the video provides detailed explanations of the risks associated with following seas and aims to promote practical knowledge of ship handling. Ship Handling in Head Seas
It is well known that when a ship is sailing into head seas it can be subjected to severe shocks and violent ship motions. Experience can teach seafarers how to handle such sea conditions but having knowledge based on reliable and proven handling techniques can make for safer encounters with head seas. This video begins by explaining the motions experienced by a ship moving in a seaway and the stresses that are induced on the hull. Such stresses can be at their worst in head seas. The resultant pitching motion can have the greatest influence on the safety of the ship. The video also looks at the effects of slamming, shipping water and propeller racing and makes recommendations about how to reduce these undesirable and sometimes dangerous effects. Shipping seas can cause severe damage to deck equipment and hatch covers. Damaged hatch covers can allow ingress of water. When a ship is moving into head seas slamming can occur. The video explains the various kinds of slamming and the resultant tendency to damage is explained. In extreme cases the slamming can cause a collapse of the hull structure. Detailed quantitative advice on how to reduce slamming is given. Ship Handling in Restricted Waters - Ship Squat and Shallow Water Effects
The various hydrodynamic effects associated with small underkeel clearances affect all ships, but are particularly important to some of the larger and faster ships that are in service today. This video and booklet gives the mariner a useful and practical explanation of these hydrodynamic effects. The descriptions include:
Ship Handling in Restricted Waters - Bank Effect & Interaction Between Two Ships
In restricted waters where the navigable width of passage is limited, ships are obliged to navigate close to the shore and close to manmade structures such as banks, quays or bridge piers. During such passages ships have to pass by or run in the same direction as other ships while keeping minimum searoom from each other. This video highlights the effects that these passages can impose on a ship's manoeuvring characteristics. When entering shallow water and having to pass other ships or move in close proximity to banks, any ship (regardless of size) may be heavily influenced by the induced hydrodynamic effects. So much so that in some cases collisions and groundings can result. The video first examines bank effect, such as may be experienced by a ship navigating in a channel or anywhere that brings the ship close to the sea bottom. By looking in detail at how ships behave in close proximity to a bank, the video builds up a picture of exactly what happens in these circumstances. It explains the influences of factors such as the distance off the bank and the depth of water. It supports the training requirements of STCW Table A-II/2. Navigating in Ice
A wise seafarer treats frozen sea and floating ice with the greatest respect. They are highly dangerous. As world trade increases, more and more ships are sailing the oceans and many are bound for some of the more remote areas and hostile climates on the planet. New oil facilities are being opened to accommodate new fields especially within or near the Arctic Circle. Consequently, many ships' crews need to understand the procedures when they encounter the unusual conditions - when the sea becomes a solid sheet of ice and their ship becomes difficult, often impossible, to steer and propel. For the inexperienced these conditions, at best, can lead to damage to the hull, rudder and propeller; at worst, they can destroy the ship. Equally, icebergs have always posed serious risks to shipping. The best way to avoid them is to avoid iceberg zones completely during their season. But, when that is not possible measures need to be taken to ensure the safety of ship and crew. This comprehensive training package, available as a CD-ROM or video plus support book, addresses both these circumstances. It clearly shows best practice in how to prepare to meet the conditions, how to navigate the ship safely and reach the destination successfully. Structured around the most important questions a seafarer should ask, the package looks at the following areas:
With the right approach navigating in ice can be, well nearly, plain sailing. |
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Code No 95
Time: 28 Mins
Time: 36 Mins
Time: 38 Mins