Retractable instrument for submarine, has filter surfaces arranged and aligned in operational position, where force is produced during driving of instrument through water and supported by extending and running instrument

The instrument (5) has filter surfaces (30, 35) arranged and aligned in an operational position, where the filter surfaces are a part of a flow body, and sides of the instrument are connected with each other. Force is produced during driving of the instrument through water and supported by extending and running the instrument. The flow body comprises a form of a wing (20). The flow body is integrated in a stand-by position in a cross sectional contour of the instrument, and includes the filter surfaces. Das Ausfahrgerät für ein Unterseeboot weist mindestens eine Anströmfläche auf, die in zumindest einer Betriebsstellung so angeordnet und ausgerichtet ist, dass bei Fahrt des Ausfahrgerätes durch das Wasser eine das Ausfahren oder Einfahren des Ausfahrgerätes unterstützende Kraft erzeugt wird.