Lenzen (ship maneuvers)

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Lenzen refers to a ship maneuver that can be carried out for weathering in heavy seas .

description

The bilge is a maneuver in which the ship sails in front of the sea that is arriving right aft. In the past, on sailing ships, attempts were sometimes made to drive away from the lakes coming up from the stern with pressed sails or to run off the sea in front of the top and rigging (without set sails). A bilge sack was often towed or lines unplugged at the stern to support the ability to steer . The impact of the hitting water was also often reduced by applying wave calming oil to the stern. Steam and motor ships billowed with the engine working slowly ahead in order to maintain the ability to steer.

Advantages and disadvantages

Since the ship makes more or less of its own voyage through the water when bilging, the sea coming in on the aft is less violent and with less encounter period than when sailing against the sea. The wake provides additional protection when bilging and, in the case of machine-driven ships, the own screw water. However, the maneuver harbors several dangers that make it one of the most dangerous maneuvers in heavy seas from today's perspective. On the one hand, ships often tend to yaw when the sea ​​is slightly to the aft sea , which can cause the ship to cross; there may also be resonance between the encounter period and its own roll period, which reduces the stability and, in addition, a deterioration in the weather may be detected too late due to the calmer sea behavior. Smaller ships, ships with poor stability, ships with low freeboard or cargo that can slip are particularly at risk. Areas of the lake in which the sea is steeper than normal are also particularly dangerous when bilging.

Individual evidence

  1. ^ Walter Gladisch, Alfred Schulze-Hinrichs: Seemannschaft , Verlag von ES Mittler & Sohn , Berlin, 1942, pp. 321–322.
  2. ↑ Friedrich Woerdemann: steamer maneuvers , ES Mittler & Sohn, Darmstadt, 1952, pp 212-213.
  3. ↑ Müller-Krauß: Schiffsführung , Volume 2, Springer Verlag , Berlin 1968, p. 275.
  4. ↑ Müller-Krauß: Schiffsführung , Volume 2, Springer Verlag, Berlin 1979, pp. 357-360.
  5. ↑ Christoph Wand (Ed.): Schiffstheorie , Volume II, Verlag für Wissenschaft und Kunst, Herne, 2008, pp. 227ff., ISBN 978-3-924670-41-2 .