With Time Interval Measuring Means Patents (Class 367/127)
  • Device for determining the relative position of elongate members towed behind a ship
    Patent number: 4187492
    Abstract: Device for determining the relative position of at least one seismic streamer comprising acoustic pulse sensors, with respect to a seismic streamer comprising acoustic pulse transmitters, all of said streamers being towed behind a ship, comprising a telemetrical system for measuring the distance between pulse sensors and pulse transmitters by the determination of the travel time of pulses between different pulse transmitters and corresponding pulse sensors and a viewing system for displaying the so-measured distance.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: February 5, 1980
    Assignee: Institut Francais du Petrole
    Inventor: Robert Delignieres