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| Name | What's The Process Of Heaving Up Anchors On Big Ships? #shorts |
| Video Uploader | Video From Milopax |
| Upload Date | This Video Uploaded At 05-08-2023 11:59:54 |
| Video Discription | What's the Process of Heaving Up Anchors on Big Ships? When it's time to heave up the anchor, it's essential to ensure there is minimum tension in the chain. Then the fascinating process comes into play. First, the anchor wash is activated to remove any mud or dirt stuck on the anchor chain from its time on the seabed. This is vital to avoid future anchoring problems. If there's no anchor wash available, a handheld pipe can do the job. During the heaving up, the person in charge keeps a close eye on the chain to spot any twists or kinks immediately. Missing them could damage the ship's structure or the windlass, the machinery used to lift the anchor. Another lookout ensures the anchor is free from debris and securely positioned in the hawse pipe. Once the chain is clear, the anchor is reported home, and the captain gives the order to secure it for sea. This involves various steps, like closing the break, using chain stoppers, and disengaging the windlass. With everything set, the big ship is ready to sail on its next voyage. #shorts #short #shortvideo #anchor #ship #aircraftcarrier Note: "The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement." ADDITIONAL READINGS: Heaving Anchor and Anchor Wash. When heaving up an anchor, the anchor wash is started. The anchor wash aims to remove any mud or dirt which might have been caught on the anchor chain, whilst it was lying on the seabed. If this mud is not removed, once the chain is stowed in the chain locker, the mud will dry, resulting in a huge block of concrete which will make future anchoring procedures difficult. If anchor wash is not available for some reason, a handheld pipe can be used to wash the mud off the chain. Another important procedure during heaving up requiring the full attention of the person in charge of the anchoring party is that of keeping an eye during the entire procedure on the anchor chain as it is being heaved up. This is done to ensure that any twists or kinks are sighted immediately and in time to stop the windlass operator from continuing to heave up. Should any kinks or twists present go unsighted, the damage will be caused to the ship’s structure and possibly even to the Windlass. Avoiding damage to the anchor system. If the paid out length of the chain has to be adjusted, or when the anchor heave-in-operations has to be started, ensure there is minimum tension in the chain. The windlass is not designed for breaking out an embedded anchor or hauling the vessel as the motor is the “weak link” in the anchoring system. An increase in tension will cause an increase in torque applied to the gypsy and, through the gearing, to the windlass motor. This may cause a significant increase in internal pressures in hydraulic windlass motors. Explosive failures of hydraulic windlass motor casings have been recorded resulting in serious injury. Other catastrophic failures of windlass components have also occurred leaving the affected vessels unable to recover their anchors until repairs have been made. To break out the anchor, lock the chain in the chain stopper. Judicious use of the rudder and engine, and bow thruster if fitted, will assist in reducing tensions in the anchor cable to assist the windlass in recovering the cable. A dual axis ground tracking Doppler log is useful for gauging the speed over the ground when maneuvering. Close cooperation between the anchoring party and the bridge team is required during any anchoring operation, but in case it is particularly important. The anchoring party should report on changes in tension, and in the horizontal and vertical direction of the cable so that the bridge team can accurately manoeuvre the vessel to the appropriate position at a sufficiently low speed. Heaving procedure Start the HPU Supply the water to wash the anchor and cable Engage the cable lifter unit to the anchor winch and insert the clutch locking pin if it is not a hydraulically operated clutch Rotate the shaft in heave direction to take up the slack in the transmission system Release the cable lifter brake Remove the secure the chain stopper locking bolt and locking pin if there is one. Open the chain stopper dog/guillotine bar. Start to haul in the anchor in low speed mode. Remember the vessel should be maneuvering towards the anchor, not ht winch pulling it. Operate the windlass carefully not to apply excessive external force (especially in heavy weather), otherwise the motor and other equipment’s may be damaged. Move the vessel so that the anchor chain is “up and down” into water during the heaving operations. If the anchor chain becomes inclined as per below figures, immediately stop the heaving operation and tighten the brake of gypsy wheel and disengage the clutch. Move the vessel so that the anchor is hanged “up and down” down vertically as per above figure, with the use of main engine and thrusters. Then restart the heaving operation. |
| Category | Education |
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