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在线测试： Test about ECDIS Display Feature v5.0
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Is the following statement True or False? Compilation scale is the scale of the paper chart from which the vector chart was made:
False.
True.
Is the following statement True or False? Traditional buoy symbols on an ENC vector chart look similar to symbols seen on a paper chart:
True.
False.
Select the correct meaning of the abbreviation ZOC in relation to ECDIS:
Zone of Confidence.
Zone of Confusion.
Zero on Carbon.
Zone of Communications.
Select the option best describes the meaning of a magenta coloured “i” in a box seen on a charted sea area in relation to ECDIS:
The ECDIS is trying to say something to the operator about the route.
It is an indicator that a chart correction has been applied.
There is some information appertaining to the sea area.
There is an object missing from the chart.
Select the option that best describes a cautionary area on the ECDIS:
Magenta cross hatching on the chart display.
Red cross hatching on the chart display.
Orange cross hatching on the chart display.
Vertical grey bars on the chart display.
Select the option that best describes how ECDIS informs the operator of an approaching chart at different scale to the one being used:
There will be a thick continuous black line visible.
The chart detail will not be visible.
An audible alarm will sound.
A visual alarm will activate.
Select the option that best describes how Temporary and Preliminary notices are shown on the vector chart in relation to ECDIS:
Ts & Ps are always shown on the chart in blue text being loaded manually.
Ts & Ps are shown in a magenta colour near the area of the notice.
Ts & Ps are always automatically loaded and visible alongside the area of concern being.
The ECDIS may not display them – a navigator’s note could be set up to show them.
Select the option that best describes the meaning of a magnet a coloured “i” in a box with a line to an object in relation to ECDIS:
It is a recently added object to the chart data set.
The position of the object is approximate.
The object has been moved with a chart correction.
There is more information available on the object than is shown on the display.
Select the option that best describes the meaning of the text “bn 10” on an ECDIS display:
Attribute set at level 10.
VHF channel 10 to be used.
Depth figure of 10 metres.
Navigation beacon number 10.
Select the option that best describes the meaning of the text “bn 12” on an ECDIS display:
VHF channel 12 to be used.
Navigation beacon number 12.
Attribute set at level 12.
Depth figure of 12 metres.
Select the option that best describes why vertical grey lines can sometimes be seen all over the ECDIS display:
The lines show where shallow water begins.
The chart scale is the same as the compilation scale.
There is not enough detail to show soundings correctly.
ECDIS is set at the wrong scale for the vector chart loaded.
Select the option that correctly completes the following statement in relation to ECDIS: “A ZOC A1 indicates the depth accuracy on the vector chart to be…”
5 m + 10 % depth.
2 m + 5 % depth figure.
0,5 m + 1 % of depth value.
1 m + 2 % depth.
Select the option that correctly completes the following statement in relation to ECDIS: “A navigation buoy cancelled with a chart update will…”
Have an orange box around it.
Have an orange diagonal line through the symbol.
Have a magenta box around it.
Be removed from the chart display altogether.
Select the option that correctly completes the following statement in relation to ECDIS: “An isolated danger buoy is represented on an ENC chart with…”
Two red spheres slightly inclined.
A single red sphere.
A single black sphere.
Two upright red spheres.
Select the option that correctly completes the following statement in relation to ECDIS: “Isolated danger symbols are not seen on a vector chart when they should be because…”
The object is not a threat to the vessel.
There will be some other symbol there that gives the same visual information.
The safety depth contour is set with too small a value.
The draught of the vessel is not great enough to hit it.
Select the option that correctly completes the following statement in relation to ECDIS: “Updates to official ENCs cover…”
All relevant chart corrections.
Changes to the chart in navigable areas.
All Temporary and Preliminary notices.
Changes to navigation buoys only.
Select the option that correctly completes the following statement in relation to ECDIS: “A grey question mark alongside an object indicates that…”
The ENC data set does not know what the object is.
The position of the object is doubtful.
There is more information available on the object.
There is an attribute missing from the object.
Select the option that correctly completes the following statement in relation to ECDIS: “A precautionary area is shown on the ENC as…”
A magenta coloured “i” in a box inside a diagonal hatched area.
A magnet a coloured “i” in a box.
A magenta filled box with red borders.
Words saying “Precautionary Area – take care” in the area.
Select the option that correctly completes the following statement in relation to ECDIS: “An isolated danger beacon is represented on an ENC chart with…”
A single black sphere.
A single red sphere.
Two upright red spheres.
Two red spheres slightly inclined.
Select the option that correctly completes the following statement in relation to ECDIS: “ECDIS alarms…”
Should never be ignored and must be investigated.
Are a nuisance and only happen when a sensor is failing to the ECDIS.
Are the responsibility of the Master alone.
Only need to be acknowledged.
Select the statement that best answer this question: Do some ECDIS devices show tidal stream values as an information overlay?
Yes – this is a standard feature embedded in all ECDIS software.
No – this feature can be seen on standalone bridge computers only.
No – this feature is not possible with ECDIS.
Yes – if they have dedicated software loaded on the ECDIS computer.
Select the statement that best answer this question: Do ECDIS depth soundings show height of tide on them?
Always, as the ECDIS can calculate tide heights automatically.
No – because the tide changes.
Most do not, but in the future most will.
Yes – they show chart datum with the maximum tide rise added on.
Select the statement that best describes a buoy symbol that is NOT properly defined in the ENC data set:
ECDIS will always define the correct characteristic of the buoy.
A spherical buoy grey in colour.
Always green for a port lateral mark, red for a starboard lateral mark.
Always red for a port lateral mark, green for a starboard lateral mark.
Select the statement that best describes how an operator establishes the nature of an isolated danger on an ENC:
Check the chart symbols catalogue to ascertain the meaning.
Check with a senior officer.
Interrogate it and ask for a pick report.
Check the surrounding area for any clues on the sea floor.
Select the statement that best describes the anomalies that are sometimes seen on ECDIS:
They are features of the ECDIS that sometimes seem illogical.
They are caused by a mismatch in the navigation signal datum.
They are ECDIS features dictated to manufacturers by Port State.
They are errors caused by the vector chart having bad information.
Select the statement that best describes the use of docking mode on ECDIS:
The ECDIS set to stand by with the vessel alongside.
ECDIS used only when the vessel enters a dry dock.
The ECDIS switched to stand by awaiting updates.
ECDIS used with the vessel close to berths.
Select the statement that best describes the use of the text “bn” on an ENC display:
They are adjectives and are used to describe land objects.
Helps the operator understand sounding figures.
“bn” is a code for the object in the data set.
Stops confusing beacon numbers and depth sounding figures.
Select the statement that best describes why a Port State Control Officer is interested in ECDIS when they undertake vessel inspections:
Because ECDIS has to comply with IMO requirements.
They are required to register the ECDIS Type for the IMO.
They enjoy playing with the new features.
There is a section on their check sheet that has to be ticked.
Select the statement that best describes why a button on ECDIS shows with a red highlight:
It is a warning to the operator that they are using a raster chart instead of a vector chart.
The ECDIS is in an alarm state.
It shows an incoming email.
It is an indication that the vector chart has loaded successfully.
What happens on the ECDIS display when the selected safety contour value does NOT exist in the chart data set?
The ECDIS will not display a contour value at all.
The next highest value will be shown highlighted as a bold line.
The depth areas will be coloured dark blue.
The next lowest will be highlighted as a bold line.
Which answer BEST describes how dredged areas are highlighted on the ENC chart display?
Dredged areas are highlighted as a text box with the words “dredged area” inside.
The depth areas will be coloured dark blue.
Dredged areas are highlighted with a grey dotted fill in the dredge area.
The next lowest will be highlighted as a bold line.
Which answer correctly completes the following statement: The safety depth contour value is calculated by adding…
The charted depth on the berth plus the draught of the vessel.
The draught of the vessel minus a safe under keel clearance.
The draught of the vessel plus one percent.
The draught of the vessel plus a safe under keel clearance.
Which answer describes how the safety depth contour is seen on ECDIS?
As a solid line with the contour highlighted in bold.
It is coloured bright orange.
It is shown as a thick dotted red line.
The contour line pulses to make it visible.
Which answer describes the minimum amount of information shown on an ENC vector chart?
The “Standard” layer.
The “Base” layer.
“SENC” layer.
ENC data set layer.
Which answer describes the two types of buoy symbols found on an ENC vector chart?
Simplified and IALA system D.
Simplified and IALA system C.
IALA systems C and D.
Simplified and traditional.
Which of the following BEST describes why a button on the ECDIS shows with a yellow highlight?
It is an alarm that should be acknowledged immediately.
It is an indication to inform the operator of something.
It is normal on ECDIS for system buttons to show yellow.
It is something associated with the land colour.
Which of the following statements is the most accurate in relation to the safety depth contour setting on an ECDIS?
The safety depth contour value is best set at a low value.
The safety depth contour value is best set at a high value.
The safety depth contour value has no effect on ECDIS operation.
The safety depth contour is best set at a value to reflect the vessel’s draught.
Which of the given features is indicated by a grey vertical rectangle on an ENC in relation to ECDIS?
A house on land.
A symbol associated with oilfields.
An undefined beacon.
The absence of chart information.
Which of the given options best describes an ECDIS being in “browse” mode?
A mode putting ECDIS into a stand by condition to investigate files.
A mode allowing the operator to look ahead on the chart.
A mode allowing the operator, not sure of their position, to fix using radar.
A mode for casual operation of the system.
Which of the options correctly completes the following statement? ECDIS display various colours and shades on vector chart depth areas, because:
It lets ECDIS know they are there.
They are easily seen by the operator.
They set off alarms on the bridge.
It stops the ship grounding on them.
Which of the statements best describes how the raster chart gives advice on data quality in relation to ECDIS?
Data quality comes from the help menu on the stand alone computer.
Data quality comes from text that describes the sea floor type.
There are notes on the chart that can be read.
The chart has a ZOC function where the data quality can be assessed.
Which of the statements best describes what happens to the sounding figures on the display when the safety depth figure is set on an ECDIS?
Depth values below the depth are highlighted in bold.
The whole sea area below that depth turns dark blue.
There will be alarms activated to let the operator know the depth under keel.
The display looks the same as it did before and is unchanged.
Which option best describes the reason behind this statement? There should be regular ECDIS monitor colour tests:
It says that in the bridge procedures guide.
Monitor test complies with IMO’s and IHO’s requirements.
The manufacturer’s warranty indicates to do this.
To ensure the monitor shows correct colours.
Which option best describes what lies below an isolated danger symbol on an ENC?
There is a rock outcrop not seen by the survey team.
There is a wreck from a sunken vessel.
There is probably a man-made subsea structure associated with oil or gas.
There could be any seafloor obstruction.
Which statement BEST describes how ECDIS sees land coded in the vector chart as a point source?
The land will show up in a green shade on the screen.
The land will not be recognised as an obstacle to the ECDIS.
When the ECDIS is zoomed in, the land will get bigger on the screen.
The land will be recognised when the route is validated.
Which statement best describes how the vector chart gives advice on data quality in relation to ECDIS?
There are source data diagrams on the chart that can be read.
The chart has a ZOC function.
It does not – the operator has to go to the help menu on the stand alone computer.
The chart has text on it that describes the sea floor type.
Which statement best describes orange cross hatching as might be seen on an ECDIS sea area?
It means that a chart correction has been added somewhere in the area.
It is an indication of a port approach area.
The ECDIS sees an area with dredged sounding values and shows it in orange hatching.
Orange cross hatching is an indication of a Cautionary area.
Which statement best describes the action needed if ECDIS cannot automatically display Temporary and Preliminary notices?
Inform the Master.
Ask a VAR to encode them into SENC format.
Ignore them as they will be made into a Notice to Mariners soon.
Annotate the ECDIS using the notes function.
Which statement best describes the meaning of the Paris Memorandum?
A government paper in France concerning hydrography.
An agreement between worldwide nations for ECDIS development.
A reminder that ECDIS should be kept up to date.
An understanding for Port State Control Officers in Europe.
Which statement best describes what happens to land in North up relative motion mode on ECDIS?
Land is stopped with the vessel symbol moving.
This is a feature only seen on radar.
Land on screen moves relative to the ship symbol.
The land is always in the middle of the screen.
Which statement best describes what happens to the land in North up true motion mode on ECDIS?
Land on the screen does not move until it resets.
The land is always in the middle of the screen.
This is a feature only seen on radar.
Land is moving with the vessel symbol stopped.
Which statement best describes what happens to the ship symbol in North up relative motion mode on ECDIS?
Vessel symbol is stopped on the screen.
Vessel symbol moves across the screen.
Vessel symbol is always in the middle of the screen.
This is a feature only seen on radar.
Which statement best describes what happens to the ship symbol in North up true motion mode on ECDIS?
Vessel symbol moves across the screen.
Vessel symbol shows the heading fixed vertically on the screen.
This is a feature only seen on radar.
Vessel is stopped on the screen land moves relative.
Which statement best describes why it is important to remove cancelled chart cells from the ECDIS?
To stop them being loaded onto the ECDIS display.
So that the computer hard drive stays uncluttered.
It is part of flag State requirements.
New charts will not load if old versions are there.
Which statement best describes why the ECDIS has settings for ambient light conditions?
The screen will automatically set light levels day on night.
To allow the bridge team time to adjust their eyes at night.
Observation of the screen is necessary under all light conditions at sea.
The sensitivity of the operator’s eyes is a factor allowing changes.
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