Seamanship Techniques 2011 E Part 14 pot

... the increase in the velocity of water is considered in relation to the pressure under the hull form, a reduction of pressure will be experienced, causing the ship to settle deeper in the water. ... this eases the weight on the towline and allows the ship’s personnel to slip the tow. However, in an emergency, if the eye had been secured over the bitts, the ship’s personnel would not have been...

Ngày tải lên: 11/08/2014, 21:21

... Checks that rudder indicator shows maximum port helm Ease the wheel to Ease the wheel to Allows the wheel to Wheel eased to port ten degrees port ten degrees, return towards the port ten degrees, sir ... 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 gre...

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

... spillages were encountered and good weather prevailed at the time. However, over large areas the time required to establish the barrier was found to be excessive, and barrier equipment needed to encircle ... rope messenger behind from the direction of the cargo hook end. Detach the old runner once clear of the derrick and secure the Flemish eye of a new runner to the messenger. Pull back on t...

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

... 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 the shoes in the process of raising the legs when ... tubular steel. Wooden derricks, which generally lifted only up to 3 tonnes, have largely been superseded. At the heel of the derrick (Figure 5.1) either a single flange or a double flange will be w...

Ngày tải lên: 11/08/2014, 21:21

... 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

... 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 ... between the two vessels shall not make the overtaking vessel a crossing vessel within the meaning of these Rules or relieve her of the duty of keeping clear of the overtaken vessel until she is ......

Ngày tải lên: 11/08/2014, 21:21