Seamanship Techniques 2011 E Part 6 ppt

... Once the slip and bottle screw are released, the gripe can be passed back over the boat and the end cleared. However, some gripes are interconnected to the trigger system, and the men in the boat ... weak link securing which will part after the painter becomes fully extended and the pressure increases, causing the safe working load/breaking strain to be exceeded. ‘D’ ring Service release De...

Ngày tải lên: 11/08/2014, 21:21

... used to sleep in the fo’c’sle head area, and the banging cables tended to keep them awake. Hence they were lashed secure. The more up-to-date thinking is that if the cable is lashed the chance of ... secured when the anchor is deployed. Deck plate Doubler Underdeck frames Hawse pipe (tubular steel) Bolster (steel) ‘D’ ‘D’ represents the diameter of the hawse pipe and is at least nine times th...

Ngày tải lên: 11/08/2014, 21:21

... use as a grease cavity. Double and treble sheave purchase blocks are of a similar construction to the single sheave, except that a partition plate separates the sheaves. They are used extensively ... RIGGING STEEL WIRE ROPE A steel wire rope is composed of three parts – wires, strands and the heart. The heart is made of natural fibre, though recently synthetic fibre has been used when resista...

Ngày tải lên: 11/08/2014, 21:21

... chain preventer when the derrick reaches the desired working height. When shackling the chain preventer to the deck lug bolt, ensure that the shackle is clear of the next link of the preventer, so ... limited 127Lifting Gear The topping lift should be secured at the head of the sheer legs and the weight taken. Care should be taken to ensure that men brace themselves against any movement of th...

Ngày tải lên: 11/08/2014, 21:21

... you expect wire lifeboat falls to be. How often would you expect them to be renewed? Ans. Extra flexible steel wire rope (6 × 36 or 17 × 7) wps. To be renewed whenever required, and at no greater ... the wheel be understood to against the swing of mean, check the the vessel, up to swing of the approx. ten degrees vessel) of opposing helm being applied to reduce the rate of swing. Eases the...

Ngày tải lên: 11/08/2014, 21:21

... and Depth Multiple echoes These are caused by the transmitted pulse being reflected several times between the sea bed and the water surface before its energy is dispersed. Such multiple reflection ... type of echo is a double reflection of the transmitted pulse. It occurs when the energy is reflected from the sea bed and then reflected back from the surface of the water before being received...

Ngày tải lên: 11/08/2014, 21:21

... the vessel may be expected to roll somewhat slowly and independently of the waves. The vessel will probably experience only moderate angles of roll, and the waves may be expected to break near ... passage exists, the overtaking operation may take place. No sound signals need be given by either vessel, because there Y X Figure 5.1 Overtaking vessel in a narrow channel. 66 Seamanship Techni...

Ngày tải lên: 11/08/2014, 21:21

... Seamanship Techniques Red Green Vessel less than 50 m in length restricted in her ability to manoeuvre. Green Red, white, red, all-round lights shown where they can best be seen. Red Range 2 miles Head ... can Green Green Conical Spar Pillar Red Green Red Red Green Preferred channel to starboard, red with green stripe, and red light flashing 2 + 1 (group flashing). Green Red Green Green R...

Ngày tải lên: 11/08/2014, 21:21

... derricks been lowered or removed? (d) Where applicable, have portable pipes been removed and have the remaining open ends been blanked off? (e) Are rope messengers to hand for securing the helicopter if ... considerable time to secure. In an emergency it may even prove impossible to secure against water pressure on one side. Regular and extensive maintenance is required on the clips to ensur...

Ngày tải lên: 11/08/2014, 21:21

... Side This term refers to that side of the vessel exposed to the wind. Seas may be seen to break over the weather side as opposed to the lee side, which is the sheltered, favoured side of the vessel. Yaw Wind ... water is not a solid medium and there is some ‘slip’ related to it. Slip may be considered as the difference between the speed of the vessel and the speed of the engine. It is always...

Ngày tải lên: 11/08/2014, 21:21