OGR 7
The OGR 7 is an optical artillery target column from the Italian manufacturer Officine Galileo for the central control of ship guns. It was mainly used for 40 mm weapons on boats of the German Federal Navy .
use
The OGR 7 was installed on all boats that carried 40 mm weapons, except for the speedboat class 148 . In the speedboat class 143 , it was used in a modified form with a dome, i.e. closed, for the 76 mm Oto Melara . Furthermore, it was partly open, partly mob-like (cocooned) installed on auxiliary ships such as utilities, tugs etc. With the OGR 7, one or two weapons could be used simultaneously against sea and air targets. Since the 40 mm guns have almost completely disappeared from the German Navy, the OGR 7 has also lost its right to exist.
One example can still be viewed today on the Weilheim minesweeper in the German Naval Museum in Wilhelmshaven.
service
The OGR 7 had a hydraulic drive and was controlled with a directional stick. It was stabilized by three gyroscopes . Two tilt gyroscopes neutralized the sea movement of the boat and an azimuth gyroscope neutralized the turning movements of the boat. If you pressed the left pedal / computer pedal , the OGR 7 and the guns were automatically always aimed at the target no matter what movements the boat made. The target was roughly grasped optically via an external auxiliary sight, then you looked through the optics and took the target in the crosshairs . There were various setting options on the optics, such as magnification and various filters.
Various setting options were used to set the distance and speed of the opponent. By pressing the left foot switch, the correct lead angle for the guns was automatically selected. If you pressed the right pedal in addition to the left pedal, the gun (s) fired. The hit probability was significantly higher than with the simple optical aiming from the gun.
Individual evidence
- ↑ Zvonimir Freivogel: The Speed Boats of the Jaguar Class , Düsseldorf 2008, p. 35
- ↑ http://www.schnellboot-kranich.de/das%20ende.htm