What is ECDIS?
- Electronic Chart Display and Information System which complies with IMO and IEC performance standards.
- SAFETY, “The primary function of ECDIS is to Contribute to the Safety of Navigation”.
Electronic Chart Display and Information System – ECDIS;
Advantages and Disadvantages of Raster Chart
Advantages Disadvantages Exact copy of a paper chart Can't Interrogate Familiarity in look and symbology Cannot be customized Good topographical detail Cannot zoom in, chart become pixilated Cheaper to produce Large file sizes World wide coverage Not seamless. need to load another chart if going off "edge"
Advantages and Disadvantages of Vector Chart
Advantages Disadvantages Charts may be rotated to any angle Technically more complex File sizes up to 10 times smaller than RNCs More Expensive Useful for correcting - easily downloaded via internet Not World wide coverage Objects can be interrogated Teaching and training takes longer and more expensive Chart data may be shared with other equipment i.e. radar, AIS Objects need to be interrogated to get information You can zoom in and it is seamless - Layering eg. CATZOG when passage planning (Category zone of confidence)
Mandatory Alarms of ECDIS?
- Crossing safety contour.
- Mandatory sensor failure
- Different geodetic datum
- deviation from route
- Approach to a critical point.
When a Vessel can be paperless?
- Officers have the IMO 1.27 ECDIS course also called as Generic Training.
- its mentioned in Ships Safety Equipment Certificate (SEC)
- Procedures – SMS to have ECDIS Procedures.
When ECDIS can be used as a Primary means of Navigation?
- Needs backup. So that if ECDIS fails still ship can navigate safely to its destination.
- it can be achieved by having a Second independent ECDIS system, or
- Official paper chart for that voyage or region.
Performance Standard: (ECDIS must be approved)[IMO MSC 232 (82), 5th Dec 2006 circular]
- Using official chart – s57
- ENC presentation – s52
- Regular update
- Support all navigation functions
- Capable of continuously plotting the ship’s position.
- Reduce navigational workload as compare to the paper chart.