Precision Navigation & Positioning

MHS provides precise navigation for all positioning requirements by adopting the latest GPS technologies. Company positioning systems utilise commercial differential signals and wide area solution differential corrections.

Differential GPS (DGPS) is today’s widely accepted form of positioning. The real time horizontal accuracy of MHS Differential Dual Frequency DGPS systems is 0.1 metre. The DGPS positioning systems, echo sounding systems and other sensors are interfaced with MHS dedicated Navigation Systems to provide on line navigation, data logging and real time quality control ‘on-screen’ monitoring.

Key Benefits

  • Real Time Differential Global Positioning Systems with an update rates up to 25 times per second
  • Dedicated navigation software providing survey design, on line navigation control and data logging of complete raw data sets
  • Real time on screen quality control and assurance


  • Free to air radiobeacon differential signals
  • Company differential base stations and VHF telemetry
  • Commercial wide area solution differential corrections

MHS uses dual-channel, automatic beacon receivers for tracking broadcasts, such as AMSA, conforming to the IALA Standard. The suitable radiobeacons in the work area are located and the closest beacon used. The receiver then continuously monitors the integrity of the data received from the differential radiobeacon(s). If excessive errors in the data stream are detected, the receiver automatically switches to a different radio beacon, if available.

MHS differential base stations, utilising VHF telemetry are used in remote areas or in specific cases. Differential corrections are then be transmitted from the base station to the rover unit every second.

MHS is licensed to use Commercial Wide Area Solution differential corrections based on commercially operated base stations or satellites removing the need for dedicated onsite base stations. The differential corrections are constantly updated as the receiver moves around.