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There are two types of electronic charts that an ECDIS can display: Raster Navigational Charts (RNCs) and Electronic Navigational Charts (ENCs,) otherwise known as vector charts.

If replacing a symbol, find the old symbol on the chart, then, as close as possible and not over any other information, draw the new symbol (Check Chart 5011). Link the new symbol to the required position with a curved line. Finally draw 2 diagonal lines through the old symbol to show that it no longer applies.

Chart work is the art of laying a safe course, fixing the position and reassuring that position, while steering the ship on that course. It's an imperative job which every navigating officer should master. It is also one of the top-tier skills which decide the competency of a ship navigator.

Global Navigation Satellite Systems (GNSS) such as GPS are the primary position sensor input for ECDIS, and it has since its early beginning in the middle of the 1990s been very reliable.

Types of ECDIS charts Raster Chart (RNC): RNCs are a direct copy or a scan of the paper charts. It looks identical to a paper chart as all the information shown is directly printed. ... Vector Chart (ENC): ENCs are computer-generated charts.

Ordering charts (Cells) for ECDIS Creating and exporting an order list of required cell permit. Sending the request to chart provider. Receiving the cell permit and. Importing cell permit.

The sensors providing the data inputs to ECDIS are the following: The global positioning system (GPS and/or DGPS). The automatic identification system (AIS). The radar and automatic radar plotting aid (ARPA).

ECDIS carriage requirements The amended SOLAS regulation V/19 requires all newly built passenger ships of 500 gross tonnage and upwards, as well as newly built cargo ships of 3,000 gross tonnage and upwards engaged on international voyages to be fitted with ECDIS.

The sensors providing the data inputs to ECDIS are the following: The global positioning system (GPS and/or DGPS). The automatic identification system (AIS). The radar and automatic radar plotting aid (ARPA).

Permits are used to control the permission to use a chart. They prevent unofficial copying and distribution.

ENCs are updated by weekly 'Notices to Mariners' issued by Hydrographic Offices / Regional ENC co-ordination centers ( RENC) and corrections are received on the vessel either by email or data file (AVCS DVD). The actual updating is either applied to the ECDIS chart database automatically or by the user.

ECDIS displays have different color schemes ("modes") to accommodate variations in the ambient light conditions; the coding scheme should be effective whether the quality of data is to be advised in day-or nighttime using either of the three mandatory ECDIS modes (day, dusk, night) shown in Figure 4. ... ...

Weekly ENC updates can also be downloaded by clicking on the yellow button Update Charts if there are updates available to download. Step 2: After the download of AVCS ENC charts is complete, click on the tab Export for ECDIS to export the AVCS ENC charts to a USB or CD.

ENCs and RNCs are kept up to date by applying regular, for example weekly, update information to the chart data via a data file. The update file may be transferred by wireless transmission, or by a suitable media e.g. CD. The actual updating is applied automatically by the ECDIS to its chart database.

Chart Correction Pen - Corrections need to be done with violet ink using pen with an extremely fine nib. The recommend nib sizes that the United Kingdom Hydrographic Office suggest are 0.18mm to insert information and 0.25mm nib to delete.