Watchkeeping - ECDIS

Question 1

What does SOLAS say that all ships shall have?

Answer 1

Nautical chart and publications to plan and display the ship’s route for the intended voyage and to plot and monitor positions throughout the voyage, an ECDIS may be accepted as meeting these carriage requirements.

Question 2

What does ECDIS stand for?

Answer 2

Electronic Chart Display Information System

Question 3

Is ECDIS mandatory?

Answer 3

Yes as per SOLAS Regulation 19, ECDIS is mandatory for passenger vessels of 500gt and up engaged on international voyages.

Question 4

What backup arrangements will meet the requirements set by

SOLAS?

Answer 4

An ECDIS system using ENCs with an independent power supply
An appropriate folio of corrected up to date paper charts for the present voyage
A Raster Chart Display System (RCDS), also known as an Electronic Chart System (ECS) using Raster Navigational Charts (RNCs), with an independent power supply
An RCDS using ENCs

Question 5

What must a primary ECDIS system do to meet carriage requirements?

Answer 5

Meet the performance standards set by IMO.
Entire ECDIS system type approved.
Have an independent backup system installed.
Used with official ENC’s for the entire voyage.
Be used with weekly chart updates.

Question 6

What is the difference between an ENC and RNC chart?

Answer 6

An ENC is a vector chart that has been digitally layered so that data can be more easily added
and amended, it does not lose resolution. A raster chart is a digital scan of a paper chart.

Question 7

What navigational instruments directly input data into the

ECDIS system?

Answer 7

Gyro, GPS, Echo Sounder, Doppler Log, Radar.

Question 8

What is the format of an ENC?

Answer 8

IHO – S57

Question 9

How are ENC’s constructed? list the “Usage Bands” associated.

Answer 9

Overview
General
Coastal
Approaches
Harbour
Berthing

Question 10

What will the construction format code provide for ENC’s?

Answer 10

The chart will be provided with a code, for example GB30132B where
GB= Issuing HO, 3= usage band and 0132B = individual cell identifying number.

Question 11

If you update the current week on ECDIS then there is no need
to update previous weeks, true or false?

Answer 11

True

Question 12

What should the time be set to on ECDIS?

Answer 12

UTC

Question 13

What is the function of the SCAMIN setting on ENC’s?

Answer 13

Additional information will disappear on a large scale chart and display is decluttered.

Question 14

Who publishes the official data required for Electronic charts?

Answer 14

National Hydrographic Offices

Question 15

Generally, what depth settings should be set on ECDIS?

Answer 15

Shallow contour -
Safety contour -
Safety depth -
Deep contour -