Abstract: A method is provided for detecting interference in a radar system. The method includes transmitting, by a transmitter of the radar system, a sequence of radar pulses at a regular interval with a rest period following each radar pulse of the sequence of radar pulses. The transmitter is disabled during each rest period. A receiver is enabled to receive reflected radar pulses from a target during the rest period following each radar pulse of the sequence of radar pulses. Some of the radar pulses are selected to be omitted and not transmitted. The receiver is still enabled during the rest periods following the omitted transmission pulses. Any reflected pulses received during the rest periods following the omitted transmission pulses may be an indication of a targeted interference of the radar system. In another embodiment, a radar system is provided.

Abstract: A drilling apparatus and a method for producing a bore in a bottom of a body of water from a floating platform that is exposed to lifting motions, such as a wave motion. The drilling apparatus includes a carrier device, a drill string substantially vertically displaceable in an axial direction along the carrier device, a drilling drive for applying torque to the drill string, and a control unit designed to control and reduce the torque of the drilling drive during drilling operation to a threshold value at which the at least one drill string element is further axially displaceable to compensate for lifting motions when there is friction on a contact surface. The drill string includes at least one axially displaceable drill string element and at least one axially extending abutment strip that is in engagement for torque transmission with the formation of the contact surface.

Abstract: The invention relates to an earth working apparatus having an undercarriage which is designed as a running gear, and an upper carriage which is supported in a rotatable manner on the undercarriage and has a driver's cab as well as a drive motor for the undercarriage. According to the invention, between the undercarriage and the upper carriage an extension segment is arranged, through which a vertical distance between the undercarriage and the upper carriage is extended. On the extension segment between the undercarriage and the upper carriage a support means for tilt protection is mounted. The invention furthermore relates to a method for earth working with an earth working apparatus of such type.

Abstract: The invention relates to a cleaning device for cleaning a bottom of a borehole in the ground and also to a method for creating a bored pile in a borehole. The cleaning device has a pumping means, through which sedimented ground material in the region of the bottom of the borehole can be sucked away via a suction opening and can be discharged from the borehole via a suction line. At least one flushing nozzle is provided, through which a flushing jet can be produced, which exits the cleaning device and flushes sedimented ground material from the bottom of the borehole. A bored pile can then be produced in a thus cleaned borehole.

Abstract: The invention relates to an earth working apparatus having an undercarriage which is designed as a running gear, and an upper carriage which is supported in a rotatable manner on the undercarriage and has a driver's cab as well as a drive motor for the undercarriage. According to the invention, between the undercarriage and the upper carriage an extension segment is arranged, through which a vertical distance between the undercarriage and the upper carriage is extended. On the extension segment between the undercarriage and the upper carriage a support means for tilt protection is mounted. The invention furthermore relates to a method for earth working with an earth working apparatus of such type.

Abstract: The invention relates to a cleaning device for cleaning a bottom of a borehole in the ground and also to a method for creating a bored pile in a borehole. The cleaning device has a pumping means, through which sedimented ground material in the region of the bottom of the borehole can be sucked away via a suction opening and can be discharged from the borehole via a suction line. At least one flushing nozzle is provided, through which a flushing jet can be produced, which exits the cleaning device and flushes sedimented ground material from the bottom of the borehole. A bored pile can then be produced in a thus cleaned borehole.