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M-ADS

M-ADS. Modified Automatic Dependent Surveillance. M-ADS BACKGROUND 1969 - THE START OF THE NORWEGIAN OIL ADVENTURE. M-ADS BACKGROUND 1973 -THE FIRST OF MANY FATAL ACCIDENTS. M-ADS BACKGROUND. 1990 : Helicopter Safety Study

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M-ADS

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  1. M-ADS • Modified Automatic Dependent Surveillance

  2. M-ADS BACKGROUND1969 - THE STARTOF THENORWEGIANOIL ADVENTURE

  3. M-ADS BACKGROUND1973 -THE FIRST OF MANY FATAL ACCIDENTS

  4. M-ADS BACKGROUND • 1990: Helicopter Safety Study • by research company SINTEF • Conclusion: Safety improvement in theNorth Sea • helicopter operations was required. • NCAA decision: To use ADS as recommended by ICAO • for surveillance outside radar coverage.

  5. 1990: RADAR COVERAGE OF THE NORWEGIAN SHELF M-ADSBACKGROUND

  6. M-ADS BACKGROUND • 1991: NCAA launched the M-ADS-project • in co-operation with: • - 7 oil companies, • - Helikopter Service AS • - Kongsberg Defence & Aerospace. • - Telenor Satellite

  7. M-ADS BACKGROUND • The ADS-Contract-system (ADS-C) was chosen for the surveillance, and based on ICAO’s ADS-concept: • - technical specifications in RTCA DO-212 • - the recommended ATN • - data-linking via INMARSAT

  8. M-ADS BACKGROUND 1991: Phase I - Testing the long communication-chain of dataflow via datalink. 1994: Phase II - Reorganisation of the project. Further testing of datalink. 1996: Report from ”ATM & Procedures task force”. Operational testing with 2 M-ADS equipped helicopters.

  9. M-ADS BACKGROUND • 1996: The M-ADS project divided in: • Operational Concept-group - producing • ”M-ADS operational criteria and procedures”. • HMI-groupproducing HMI-specifications for • the ”Radar and ADS Display System” (RaADS).

  10. M-ADS OPERATIONAL • 1999: January1st - M-ADS mandatory for all helicopters • operating on the Norwegian Shelf. • April 22nd - operational testing at Stavanger ATCC. • October 1st - M-ADS installed in 38 helicopters. • 2000: January 1st - M-ADS operational at Stavanger, • Trondheim and Bodø ATCC

  11. M-ADS OPERATIONAL Purpose To improve safety by improved ATS with surveillance of all offshore helicopter operations on the Norwegian Shelf. The result: - Improved Alerting Service - Improved Flight Information Service

  12. M-ADS OPERATIONAL • Improved Alerting Service RaADS provides automatic functioning alarms • (by blinking, colour, sound, position, time) when: • - update of a radar-track has failed • - update of an ADS-track has failed • - abnormal descend occurs • - the pilot initiates emergency signals

  13. M-ADS OPERATIONAL Alerting Signals • - Transponder code 7500/7600/7700 • - Activated alarm-button on the M-ADS equipment • - Emergency descend (2000 FT/min.+) • - ”Coasting” of a radar-track • - ”Timetag” when no update of an ADS-track

  14. M-ADS OPERATIONAL • Improved Flight Information Service • RaADS will display all radar- and ADS-tracks to ATS • integrated at one display. The improvements for ATS: • - Able to give exact traffic information • - Collect information from helicopter FMS (via ADS) • - Maintain continuous surveillance ( = dct. routing ) • - No oral position reports => • less R/T load + improved ATS alertness

  15. M-ADS OPERATIONAL • Information Groups: • Basic:Latitude/Longitude Altitude Time when message was sent • Accuracy (Figure Of Merit) • SSR: SSR code + on/standby indication • Weight-on-wheels + valid indication

  16. M-ADS OPERATIONAL Earth Reference:True Track Ground Speed • Vertical Rate

  17. M-ADS OPERATIONAL Air Reference:True Heading (Mach Speed) • Vertical Rate

  18. M-ADS OPERATIONAL Meteorological:Wind Speed Wind Direction • Temperature

  19. M-ADS OPERATIONAL Predicted RouteLat/Long/Altitude at next waypoint ETA at next waypoint • Lat/Long/Altitude • at next + 1 waypoint

  20. M-ADS OPERATIONAL Position update rate: Operational (Test period) • Normal rate: 30 seconds (45 seconds) • Tracks within 20NM • + sep. less than 1000’: 20 seconds (30 seconds) • Tracks within 10NM • + sep. less than 1000’ • and ops. below 700’:10 seconds (15 seconds)

  21. M-ADS OPERATIONAL • ADS-areas • Published area • - Between land and the main oil fields • - From 1500’ MSL to FL85 • - In Class G airspace

  22. M-ADS OPERATIONAL • The purpose • - Provide ADS and radar based Alerting Service and FIS • to M-ADS equipped aircraft • - Reduce flight time by direct routes • - Published request to all other traffic to avoid ADS-areas • or to establish contact with the ATC before entering

  23. M-ADS OPERATIONAL ADS-AREAS: Frigg Sleipner Ekofisk

  24. M-ADS THE FUTURE • Development • - datalink via VHF for • Air Traffic Control Service • - combined ADS-C and ADS-B • (with CDTI and CPDLC) • CDTI = COCKPIT DISPLAY OF TRAFFIC INFORMATION CPDLC = CONTROLLER PILOT DATA LINK COMMUNICATION

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