Longkou Port NR21 into port oil terminal profiles

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Longkou Port NR21 oil terminal profile and enter the port issues

Imposed by external forces on the ship. More easily rotate the ship: the heart in turn imposed by external forces on the ship near the office. Differential rotation of the ship, the closer the heart at the turn, spin worse. U-turn in the ship, side push to use, ship collision avoidance, and many other tugs assisting the ship's transfer involves the heart. Grasp the heart of the ship's turn. Use of improved heart function brought many conveniences to give ship handling: however. If you switch, bN with bad, the ship will cause trouble driving. A variation of the heart vessels turn the ship movements around the same time pushing the fluid, and the fluid around the ship before being filled again occupied the space. When the ship relative to the forward movement of water, close to the bow at the water in the transient is accelerated (ie,[link widoczny dla zalogowanych], water pressure), when the water flow and its velocity is the same speed, can the water as a fusion with the ship together as a whole. The ship is virtually increase the quality or said virtual added mass. Since the stern flow (wake) speed has been filed here, the acceleration is very small, the water pressure there is very small, so the added mass produce much less. Ship in the static case, the ship transferred to changes in the heart with the ship as the center of gravity changes in the same direction: when the ship relative to the forward movement of water, equivalent to bow added at the weight, center of gravity forward, the heart is naturally transferred to the ship before the move. At this point,[link widoczny dla zalogowanych], we can get the following explanation of changes of the heart turn: the faster the velocity of water vessels, the top side of the stream of water under greater pressure vessel, the greater the resulting added mass, center of gravity moves towards the top of stream surface, heart will turn the ship toward the top of stream surface movement. So. When the forward movement of the ship on the water, turn the ship before the heart to move center of gravity, the relative speed of the faster, turn more hearts forward; ship after the movement of water toward. After the switch to the heart center of the ship to move, and for Water VHFCH16 channels. Out by the Hong Kong and the arrangements for transfer channel arranged; ship cast anchor, berthing must be reported to the Marine Department, Longkou. Generally deep draft vessels can not anchor in the designated anchorage. Master of self-floating outside the 0}} select anchor points, the Marine Department can only ask that clean channel. Move faster, turn the ship after the shift the more heart. Transfer in the heart of the ship, usually without regard to wind pressure. In fact, the wind pressure changes in the heart of the ship is transferred have a certain influence. Because air density is much smaller than water density. The added mass can be derived is much smaller, so the research when the switch changes of heart, for the ship only need to consider the water pressure can be 2 to 2.1 instances of the use of heart assist tug when the ship turned around and turn the heart cycle Figure 1 shows the use of: ① to ④ role for the tug of the four points, can also be dragged on top. When the forward movement of the ship on the water. That SPD> 0, when the use of tugs to control the ship turn right and turn, we compare the point of ① to ④ of four cycles of effect (turn right and turn to the icon in the ① and ④ to push for the top point, ② and ③ to drag points). Forward movement of the ship, turn the heart to move close to the bow position before, ③ and ④ the role of arm than the role of ① and ② arm, so ① ③ and ④ the effect is much larger than the effect ① and ②. The general effect of the applied drag just the top of its thrust 7O% or so. Therefore, it is easy to come by four points over ③ effect of the size of the force cycle sequence along ② ④ as: ④> ③> ①> ②. Location map Figure tug effect we mentioned in the introduction,[link widoczny dla zalogowanych], the ship is a moving track aircraft movement and security syncline combined rotary motion trajectory. ① and ② the role of the top drag force transferred by the center point of the closer closer to its effect in the center of gravity when the ship still at the push effect, that is,[link widoczny dla zalogowanych], no spin, likely cause the entire ship leaving only the front ramp turn right and freedom movement movement. According to the author's experience, and 30 tons fully loaded oil tanker (VLCC), when the SPD <lkn, turn the heart of its center of gravity almost coincide, that is similar to the quiescent state. When the speed reaches a certain value, in Figure l, in ③ and ④ Department will greatly increase its force rotation effect. Easily lead to the front left and move the entire ship. So when we found the left front of the water by the air flow pressure limited or starboard side effects should be taken at the facilities in ① or ② the top drag; and when found in the waters near the right is limited or horizontal air flow pressure port side effect should be taken in ③ ④ at the force or to avoid force in ① and ② Department. 2.2 The role of lateral push and tug boat speed control requirements of the thruster control in the first disk on the instrument, often marked with \Meaning is to make the thrusters can effectively push their side effects must be Hong Kong El supply inconvenient. Purchase of foreign ships through the offered food, otherwise the port can not enter; fresh water supply can only anchorage in the harbor, dock without water facilities. Of: DENG Xiao-ming. China Shipping International Guangzhou Branch \