Podcast
Questions and Answers
What is the primary function of the SCAMIN attribute in ENC?
What is the primary function of the SCAMIN attribute in ENC?
- It controls the color scheme of the chart display.
- It determines the level of detail shown for each feature.
- It sets the safety depth for alarms.
- It manages the scale at which objects are displayed on the chart. (correct)
Which of the following is NOT a typical mode for navigational display?
Which of the following is NOT a typical mode for navigational display?
- Custom display
- Standard display
- All display.
- Base display (correct)
If a user sets a safety contour value on the ECDIS, what does the system highlight?
If a user sets a safety contour value on the ECDIS, what does the system highlight?
- Areas shallower than the user defined value
- Areas deeper than or equal to the user set value (correct)
- Areas equal to the user set value.
- All charted depth areas.
What is the main difference between two S-57 symbols, the first being a purple circle with a cross, and second a blue circle with a dot?
What is the main difference between two S-57 symbols, the first being a purple circle with a cross, and second a blue circle with a dot?
In which menu of a Transas ECDIS would a user typically find safety parameters to adjust?
In which menu of a Transas ECDIS would a user typically find safety parameters to adjust?
In addition to the software and hardware, what else is required for an Electronic Chart Display and Information System (ECDIS)?
In addition to the software and hardware, what else is required for an Electronic Chart Display and Information System (ECDIS)?
What is the primary international standard used for the exchange of data within maritime digital charts?
What is the primary international standard used for the exchange of data within maritime digital charts?
Which of the following is NOT a minimum sensor requirement for a primary ECDIS?
Which of the following is NOT a minimum sensor requirement for a primary ECDIS?
What does the abbreviation 'ECDIS' stand for?
What does the abbreviation 'ECDIS' stand for?
Which organization is responsible for establishing the performance standards for ECDIS?
Which organization is responsible for establishing the performance standards for ECDIS?
What type of electronic chart is the most similar to a traditional paper chart image?
What type of electronic chart is the most similar to a traditional paper chart image?
Which chart type is used in an ECDIS and consists of layers of data?
Which chart type is used in an ECDIS and consists of layers of data?
What reference is used for the horizontal datum required for geographic positions shown on an ECDIS?
What reference is used for the horizontal datum required for geographic positions shown on an ECDIS?
Flashcards
What is defined in the S-57 Catalogue?
What is defined in the S-57 Catalogue?
The S-57 Catalogue defines the objects and their attributes used in Electronic Navigational Charts (ENCs).
How many object classes are defined in the S-57 Catalogue?
How many object classes are defined in the S-57 Catalogue?
The IHO (International Hydrographic Organization) S-57 Catalogue includes 160 different object classes.
What is the purpose of SCAMIN?
What is the purpose of SCAMIN?
The SCAMIN (SCAle MINimum) function is used in ECDIS to control the display of objects based on zoom level. It automatically activates and deactivates the display of objects, ensuring optimal visualization at different zoom levels.
What does the ECDIS highlight after a user sets a safety contour?
What does the ECDIS highlight after a user sets a safety contour?
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Are the symbols used in ENC charts different from traditional paper charts?
Are the symbols used in ENC charts different from traditional paper charts?
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What does ECDIS stand for?
What does ECDIS stand for?
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Who sets the performance standards for ECDIS?
Who sets the performance standards for ECDIS?
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What makes Electronic Chart Systems (ECS) different from ECDIS?
What makes Electronic Chart Systems (ECS) different from ECDIS?
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Why are Vector charts used in ECDIS?
Why are Vector charts used in ECDIS?
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What is the difference between Raster Charts and Vector Charts?
What is the difference between Raster Charts and Vector Charts?
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What is the standard for digital hydrographic data used in ENC?
What is the standard for digital hydrographic data used in ENC?
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What is manual updating in ECDIS?
What is manual updating in ECDIS?
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What is the horizontal datum for geographic positions on ECDIS?
What is the horizontal datum for geographic positions on ECDIS?
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Study Notes
ECDIS Components and Standards
- ECDIS (Electronic Chart Display and Information System) consists of official Electronic Navigational Charts (ENCs), approved ECDIS software, approved hardware, approved installation, and chart corrections subscriptions.
- The international standard for exchanging maritime digital chart data is S-57.
- A primary ECDIS requires minimum GPS, gyro, and log sensors.
- IMO sets the performance standards for ECDIS.
- IHO sets the performance standards for electronic charts.
- Electronic Chart Systems (ECS) do not comply with IMO ECDIS standards.
- IMO Resolution A.817(19) defines ECDIS performance standards.
- Paper-based navigation is disallowed, raster charts cannot completely supplant paper charts.
- The standard for digital hydrographic data is S-57.
- S-63 is the standard for encryption for protection.
- S-52 is the standard for colours and symbols, and can differ from traditional paper charts.
Electronic Chart Types
- Raster charts resemble paper charts visually.
- Vector charts use layered data.
- Vector charts enable data-driven alarms.
- ENC charts used in ECDIS are vector charts.
- Not all navigable waters are covered by ENCs.
- RCDS (using RNC or Reduced Functionality Chart Display System) requires a full paper chart backup.
- IHO publishes S-57 data.
Chart Updates and Data
- Manual updating allows users to correct old chart objects and edit existing charts.
- The horizontal datum for geographic positions in ECDIS is WGS-84.
- An ENC is an officially approved vector chart.
- IMO defines ENC (Electronic Navigational Charts) charts.
- The S-57 catalogue defines chart objects and attributes.
- There are 160 object classes in the IHO catalogue.
Display Modes and Safety Considerations
- Base display mode is not allowed for navigation.
- SCAMIN (Scale Minimum) controls display object visibility during zooming.
- ENC chart symbols (S-52) sometimes differ from traditional paper chart symbols, but some may be similar.
- ECDIS displays a safety contour identical or deeper to the user-specified value.
- S-57 symbols vary in meaning:
- A lilac circle with a cross indicates an isolated hazard, unsafe to navigate over.
- A blue circle with a dot indicates an isolated hazard, safe to navigate, or in non-navigable waters.
- Safety parameters are changed in the Transas ECDIS "Monitoring" menu, typically.
- Aids to navigation (buoys, beacons) are displayed in layers other than the base layer.
- The meaning of an S-52 chart symbol is determined by using the information function.
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