Electronic chart display systems

Standard features of electronic chart display systems include the display of electronic vector and/or raster charts overlaid with the position of the ship and its track, and facilities to route plan and automatically update charts using digital notices to mariners. Navigation sensors such as GPS, log and gyro wil be connected to provide positional information. An autopilot may also be connected when the electronic chart display system is installed as part of an integrated bridge system.

Some electronic chart display systems offer the capability to display radar data overlaid on the chart. This can be either selected targets or a full radar picture that can be independently controlled. Caution should always be exercised where target vectors based on the ship's speed through the water are overlaid on an electronic chart that is displaying speed over the ground.

Factors that will determine to what extent an electronic chart display system can be used will include the type of system that has been fitted, the ability of that system to display official nautical charts, and whether or not the flag state administration alows its use for navigational purposes.

Electronic chart displays systems can be categorised as ECDIS, RCDS or ECS. Electronic Chart Display and Information System (ECDIS):

• ECDIS, with adequate back-up arrangements, may be accepted as complying
with the SOLAS requirement for ships to carry up-to-date charts, when
displaying ENC chart data. A performance standard exists for ECDIS.

Raster Chart Display System (RCDS):

• RCDS, or an ECDIS used in a RCDS mode of operation, displaying RNC chart
data should at the present time only be used as a supplementary navigation
tool together with a complete folio of up-to-date paper charts. No
performance standard currently exists for RCDS. A review is currently underway
in IMO as to whether or not RCDS, supported by a reduced folio of small scale
paper charts and adequate back-up arrangements, will be acceptable as
complying with the SOLAS requirement for the carriage of charts.

Electronic Chart System (ECS):

• ECS should only be used as a supplementary navigation tool together with a
complete folio of up-to-date paper charts.

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Date: 2016-04-22; view: 1121