Maneuvering the Sally Maersk

More documents

Recommendations

Info

Figure 29. Bow thruster (not Sally Mærsk's thruster)A thruster is a device combined of a pipe crossing the vessel's hull and a propellerat the center of the pipe capable of pumping water from one side of the vessel to theother, thus producing a vacuum on the one side of the vessel and a lateral push orthrust on the opposite side. The main purpose of the thrusters is to provide a positiveside thrust at a 90° angle to port or starboard side of the vessel when steering byrudder alone is insufficient at low speed.EfficiencyLoaded conditionBowthrusterSternthrustersof bow- and stern thrustersBallast conditionBowthrusterSternthrustersSpeedaheadinknotsEfficiency in percent100 100 100 100 075 88 50 85 350 75 0 70 625 63 0 55 90 50 0 40 12Figure 30: Efficiency of bow- and stern thrusters.As it can be seen from the table, the thrusters are most efficient at low speed. At aspeed of zero knots ahead, the thrusters provide a maximum of 60 t. While at 12knots the effect is down to some 25 t. in total.18
Figure 31: Thruster controls.The thrusters are operated from the bridge via the thruster controls. The upperhandle is for controlling the bow thruster and the low handle controls the sternthruster. Thrust is produced by turning the handle to either starboard or port.The primary use of the thrusters is in and around the harbor area where the vesselis progressing at slow speed with limited powers of steering on the rudder. Thrustersare used for turning the vessel around its axis and for sideward movements.19
Page 1 and 2: Maneuvering the Sally MaerskM O R T
Page 3 and 4: MANEUVERING THE SALLY MÆRSKIntrodu
Page 5 and 6: Figure 2. Helm standThe rudder move
Page 7 and 8: Auto PilotThe auto pilot is capable
Page 9 and 10: identical function but the limitati
Page 11 and 12: Passage plan: ROTTERDAM DEPARTUREWP
Page 13 and 14: Figure 22: Turning circle for Sally
Page 15 and 16: Figure 25. Main engine telegraph.Ba
Page 17: Figure 28: The crash astern test.Fi

Maneuvering the Sally Maersk

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?