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ECDIS: New standards & old underwater rocks

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Webinar on: IHO S-52 Presentation Library 4.0, ECDIS as an anti-grounding device, Safety Contour and Safety Depth setup, information layers, utilities.

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ECDIS: New standards & old underwater rocks

  1. 1. ECDIS: New standards & old underwater rocks
  2. 2. Tokyo and the Paris (MoU) on PSC joint Concentrated Inspection Campaign (CIC) on SAFETY OF NAVIGATION • This inspection campaign will be held for three months, commencing from 1 September 2017 and ending 30 November 2017. A ship will only be subject to one inspection under this CIC during the period of the campaign. • Port State Control Officers (PSCOs) will use a list of 12 questions to assure that navigation equipment carried onboard complies with the relevant statutory certificates, the master and navigation officers are qualified and familiar with operation of bridge equipment, especially ECDIS, and that navigation equipment is properly maintained and functioning.
  3. 3. ECDIS Carriage Requirements •SOLAS CH5-REG19: “.4 nautical charts and nautical publications to plan and display the ship's route for the intended voyage and to plot and monitor positions throughout the voyage. An electronic chart display and information system (ECDIS) is also accepted as meeting the chart carriage requirements of this subparagraph. Ships to which paragraph 2.10 applies shall comply with the carriage requirements for ECDIS detailed therein; .5 back-up arrangements to meet the functional requirements of subparagraph .4, if this function is partly or fully fulfilled by electronic means;**” ** Refer to appendix 6, Back-up requirements of Performance standards for electronic chart display and information systems (ECDIS) (resolution A.817(19), as amended). An appropriate folio of paper nautical charts may be used as a back-up arrangement for ECDIS. Other back-up arrangements for ECDIS are acceptable.
  4. 4. ECIDS standards IMO PERFORMANCE STANDARDS FOR ECDIS • Resolution A.817(19): Performance standards for electronic chart display and information systems (ECDIS) • Resolution MSC.64(67): Recommendations on new and amended performance standards • Resolution MSC.86(70): Adoption of new and amended performance standards for navigational equipment • Resolution MSC.232(82): Adoption of the revised performance standards for electronic chart display and information systems (ECDIS)
  5. 5. ECIDS standards IHO STANDARDS FOR ECDIS https://www.iho.int/mtg_docs/enc/ECDIS-ENC_StdsIn_Force.htm • S-57 Transfer Standard for Digital Hydrographic Data • S-52 Chart Content and Display Aspects of ECDIS • S-61 Product Specification for Raster Navigational Chart (RNC) • S-63 Data Protection Scheme • S-100 IHO Universal Hydrographic Data Model
  6. 6. ECIDS standards IHO STANDARDS FOR ECDIS https://www.iho.int/mtg_docs/enc/ECDIS-ENC_StdsIn_Force.htm
  7. 7. IHO S-52 Presentation Library 4.0 Set of new IHO standards address the following main areas: • New design of Chart object info functionality (Pick report) makes access to ENC chart information easier and understandable for user • Reorganization of alert management resulting in less alarms being generated by ENC objects • Crossing navigational hazards (isolated dangers and aids to navigation) as well as areas with special conditions (TSS, anchorage areas, etc.) will generate only visible alarms now • Safety contours continue to create audible and visible alarms • Standardized way of making ENC update status report will allow mariners and Port State Control inspectors to confirm that the ENCs installed in an ECDIS are up-to-date • Chart management and ENC status reports • ENC test data sets • Other modifications - new symbols, names of fairways and anchorage areas, highlighting ENC updates, date dependent objects, new chart display layers, and some more
  8. 8. Alarm (RED) & cautions (YELLOW)
  9. 9. A 'hover-over' feature
  10. 10. ENC Update Status • US1AK90M.000 / 31-05-2017
  11. 11. Dated objects
  12. 12. NP133C - Admiralty ENC Maintenance Record 1. Digital Chart Service Certificate 2. Schedule A 3. ENC Status 4. Temporary and Preliminary Notices to Mariners and ADMIRALTY Information Overlay status 5. Important Service Notices (e.g. the README file ) 6. Section VIII of ADMIRALTY NMs 7. Cancelled and Withdrawn ENCs 8. Maintenance of ECDIS 9. ECDIS Installation
  13. 13. Digital Chart Service Certificate
  14. 14. Admiralty NTM’s and Readme.txt https://www.admiralty.co.uk/maritime-safety-information/admiralty- notices-to-mariners# • Admiralty NTM ch. VIII • ENC_Root/readme.txt
  15. 15. ENC Update Status • https://www.primar.org/primar-enc-download • https://www.admiralty.co.uk/digital-services/digital-charts/admiralty- vector-chart-service?selectTab=Support • NP133C - Admiralty ENC Maintenance Record
  16. 16. ENC Update Status US5CA21M / 31-05-2017
  17. 17. ENC Update Status
  18. 18. AIO – Admiralty Information Overlay • AIO contains all ADMIRALTY Temporary and Preliminary Notices to Mariners (T&P NMs) and ENC Preliminary Notices to Mariners (EP NMs) which highlight navigationally significant differences between ENCs and ADMIRALTY paper charts.
  19. 19. AIO – Admiralty Information Overlay Kongsberg K-Bridge ECDIS
  20. 20. AIO – Admiralty Information Overlay • Not all ENC producers include Temporary and Preliminary (T&P) Notices to Mariners (NMs) in their ENCs. The following table lists the confirmed status of T&P NMs in the ENCs that are available in AVCS and the ADMIRALTY ECDIS Service. • https://www.admiralty.co.uk/AdmiraltyDownloadMedia/AVCS/ENC- TandP-NM-Status.pdf Also, ECDIS has to be compatible with AIO.
  21. 21. What about Primar? https://www.primar.org/t-p-notices T&P availability list
  22. 22. NAVAREA & Local warnings?
  23. 23. IMO accuracy standards • IMO mandatory requirements to carry ECDIS & GPS (SOLAS, Ch. V, Reg. 19) • together with standards given in resolutions A.953(23) & A.817(19) / MSC232 (82) made revolution of the mind in navigation
  24. 24. IMO accuracy standards
  25. 25. IMO accuracy standards: Old standard А.529(13) Phase of the voyage Order of accuracy Harbour entrances and approaches and waters in which the freedom of manoeuvre is limited Depends on local circumstances Other waters 4% of distance from danger with a maximum of 4 nautical miles For instance, at 10 nm to danger, possible 95% error was 4 cables!
  26. 26. New standard А.953(23) Area of navigation Position accuracy 95% Update rate System reliability Harbour entrances, harbour approaches and coastal waters High volume of traffic and/or significant degree of risk ≤10 meters ≤10 seconds for computed & displayed position ≤2 seconds if used for AIS, graphical display or direct control of ship Continuity ≥ 99,97 % (3 hours duration); Availability ≥ 99,8 % (2 years period); Time to alarm: 10 seconds Low volume of traffic and/or less degree of risk Continuity ≥ 99,85 % (3 hours duration); Availability ≥ 99,5 % (2 years period); Time to alarm: 10 seconds Ocean waters ≤100 meters Availability ≥ 99,8 % (30 days period); Time to alarm: as soon as practicable by Maritime Safety Information (MSI) systems
  27. 27. STCW code, Ch. VIII standard: • “… Fixes shall be taken at frequent intervals, and shall be carried out by more than one method whenever circumstances allow. When using ECDIS, appropriate usage code (scale) electronic navigational charts shall be used and the ship’s position shall be checked by an independent means of position fixing at appropriate intervals.”
  28. 28. Analysis of chart information • Before using a chart to plan or navigate a passage, mariners should make themselves aware of the quality of the survey data that has been used to place the soundings and contours on the chart, since not all sea areas have been surveyed to modern standards or even systematically surveyed at all.
  29. 29. Analysis of chart information • Indeed large areas of sea, especially in offshore areas, have never been systematically surveyed to any standard. • The chart will have been compiled from the best data available but this does not mean that shoal areas dangerous to navigation will not exist.
  30. 30. Source diagram on BA paper & raster charts
  31. 31. CATZOC on ENC’s
  32. 32. Scale of survey
  33. 33. Kind of survey UNSURVEYED LEAD LINE SINGLE BEAM ECHO SOUNDER MULTI BEAM ECHO SOUNDER
  34. 34. UKHO depth criteria for wrecks
  35. 35. Scale effect on the accuracy
  36. 36. Differences in horizontal datums Datum by UKHO definition:
  37. 37. Differences in horizontal datums • Not all navigational charts are referred to WGS-84 datum. Some of them are referred to other known datum (as per UKHO for 2009 – 25%), or to unknown datum (for 2009 – 20%; mainly Central & Southern America, Africa, Indonesia). Error due to use of different datums may reach up to 400 m. • On the charts referred to known datum, corrections for GPS positions are normally given. However, even in this case differences may be unevenly distributed through the chart. • On the charts referred to unknown datum corresponding note about discrepancies with GPS position is placed. • It is recommended to make position fix by terrestrial observations in the areas where the charts are not referred to WGS 84 datum.
  38. 38. Differences in horizontal datums
  39. 39. Depth contours Chart sounding datum Shallow Contour Safety Contour (input value) Safety Depth Shallow Water Unsafe Water Deep Water Navigable AreaNon-navigable Area Safe Water
  40. 40. Depth contours Depending on the safety parameters, the display mode and the position of an object, its presentation style might change in order to indicate a danger. Example - Isolated Dangers: The symbol for an ”isolated danger” will change depending on your safety contour. If the isolated danger has a safe passing depth less than your safety contour, it will be considered ”not safe to pass over” and the top warning symbols will be in use. If the safe passing depth is more than your safety contour, the isolated danger becomes insignificant and is only shown if selected in chart layers and according to the blue symbol. The same happens if the isolated danger lies in waters already declared non-navigable by the safety contour. Isolated danger of depth less than the safety contour in safe water Underwater hazard with a defined depth, outside the safety contour in non-navigable water, or within safe water and depth greater than the safety contour.
  41. 41. 8m safety contour Isolated dangers not displayed 8m safety contour Isolated dangers displayed 10m safety contour Isolated dangers displayed 11m safety contour Isolated dangers not displayed
  42. 42. Isolated dangers
  43. 43. Isolated dangers
  44. 44. Isolated dangers
  45. 45. SCAMIN On the upper approach chart you can see the borders of a more detailed harbor chart. This is called a source break. As you start zooming in, all available objects will be displayed. The filtering of information at a certain scale is called SCAMIN. If it is activated, the chart will remain readable as you are zooming out. Not using SCAMIN might clutter the screen as you are zooming out.
  46. 46. Overscale and underscale Data on concrete objects If the information has been coded directly into the data in such a way that it can be read and processed without using a legend, than the referencing is called EXPLICIT With the explicit reference it is always possible to get the right answer Example: What kind of an object or area can be seen? Entity Information Explicit : Data on concrete objects Geometry Explicit : Location and coordinates data
  47. 47. Overscale / Underscale
  48. 48. Overscale / Underscale
  49. 49. Overscale / Underscale
  50. 50. Overscale / Underscale
  51. 51. Standard Display – Safe? IMO MSC 232(82) 3.4 : “Standard Display is the display mode intended to be used as a minimum during route planning and route monitoring.”
  52. 52. Standard Display – Safe? IMO MSC 232(82) 3.4 : “Standard display consisting of: .1 display base .2 drying line .3 buoys, beacons, other aids to navigation and fixed structures .4 boundaries of fairways, channels, etc. .5 visual and radar conspicuous features .6 prohibited and restricted areas .7 chart scale boundaries .8 indication of cautionary notes .9 ships’ routeing systems and ferry routes .10 archipelagic sea lanes.”
  53. 53. Standard Display – Safe?
  54. 54. Standard Display – Safe?
  55. 55. Standard Display – Safe?
  56. 56. Target association
  57. 57. Key4Mate ECDIS sources http://key4mate.com/tags/ecdis Книга: Есть вопросы по ECDISу Автор: Евгений Богаченко
  58. 58. BoNMarine.net • E-learning platform for mariners • Tests and courses • Blog, news and events facebook.com/bonmarine.net Instagram.com/bon_marine

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