NAV 5 EXAM

Gabriel Bionat · 30問 · 2年前

通報

問題一覧

It is the most Important Element of Passage Planning.

position fixing

This mode of ARPA should be used in for traffic surveillance purposes

True motion Co-Up or True motion N-Up

They are placed along coasts and navigable waters as guides to mark safe water and to assist mariners in determining their position in relation to land and hidden dangers.

Aids to Navigation

It is the result and risk of over-reliance to ARPA

Indirectly the main reason for an accident

The Primary and Secondary methods used for position fixing in an open sea navigation

Primary is GPS fox and secondary is Celestial fix

What are the two acquisition facilities required in the target acquisition in ARPA.

Manual and Automatic acquisition

it is ensured to be set in the ECDIS, so that GPS positions are marked and recorded automatically in the ECDIS

Position Fixing Interval

if there is a radar conspicuous object and if object is also visible, what becomes of primary and secondary methods to be used as position fixing?

Primary "Visual fix". secondary "Radar fix"

in veiting up and maintaining ARPA display, what is the required log to be selected?

Log should provide speed through the water

An ARPA should be able to automatically and simultaneously track and process how many targets as per IMO?

At least "20" targets

It is a method of position fixing technique wherein the motion of the vessel is constantly monitored

Parallel Indexing

What is not a possible threat in ARPA errors in the Interpretation of Display

Will have no problem at all

They are example of an aids to Navigation

Buoys and Beacons

How often does ARPA provide the Navigator with the possible overview of the traffic situation?

At all times

ARPA display as prescribed by IMO, must be a separate or an integral part of what navigational equipment?

Radar

The meaning of an acronym "XTE" and a symbol in the marine Radar/ARPA.

Cross Track Error

An ARPA error that is caused by Input errors from the radar which causes unstable computations and erratic target behavior

Random track errors

An ARPA symbol which indicates an area to be avoided based on CPA and TCPA settings relative to target speed.

PAD

It is a demarcated area on a screen in order to alert the officer to the presence of previously undetected targets that have entered this zone

Guard zones

An ARPA symbols can be found in this list

IECM

Which of the statements listed below is not the capability of ARPA

it can automatically delete a tracked target

A symbol in the ARPA provided on request consisting of at least 4 equally spaced past positions of an echo.

Areas that can be selected where automatic acquisition is inhibited.

Area rejection boundaries

It is the primary requirement for all the users of ARPA

Knowledgeable in the principle of manual plotting

A situation in which the incoming radar data for a tracked target becomes incorrectly associated with another tracked target or a non-tracked radar echo.

target swap

ARPA symbol which indicates a point at which a collision could take place.

PPC

It means tracks displayed by the radar echoes of targets in the form of a synthetic afterglow.

Trails

Refers to simulating the effect on all tracked targets of an own ship maneuver with or without time delay.

Trial maneuver

Radar/ARPA error caused by misreading a relative vector to Indicate a true course and speed

Interpretational error

Time prescribed by IMO to cancel unwanted ARPA data

Within 3 seconds

How does ARPA take the bearing of the target?

At the center of target's echo

Position fixing method useful in reduced visibility, areas of high traffic density and coastal stages of a voyage

Parallel indexing

It is the term used when the apparent center of radar echo moves over the full ship's length

Glint

Known as a basic display of bearing and range of each target normally displayed by the radar, 10

Plotting data

A full report of each target can be called up, giving details of the target's CPA, TCPA, course and speed.

Numerical Data of each target

What is "95% probability values" means in the accuracy values of ARPA as prescribed by IMO

95% confidence levels values"

Which statement is true concerning the detection performance of ARPA?

It should not be inferior to Radar

What are the two motions display of a Radar/ARPA

True and Relative motions

How do we decide the position fixing interval?

Enough time to take course corrective action

What is the effect in the Sensitivity of ARPA tracking system when operating in automatic aquisition mode?

Decrease the sensitivity of tracking system

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