Test for Officers onboard about Navigation, Operational Level (CES v6.0)

Test results

The test consisted of 80 random questions.
Total questions on this topic: 209
Your result: 63%
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Right answers:
1

What is the probable cause of an error in position of the ship obtained from the GPS system?

Correct answer:

Incorrect height of the antenna.

Your Answer:

All of the suggested answers.
2

When using the echo sounder in a river the soundings indicated may be incorrect, what would be the most probable cause of the error?

Your answer is correct:

The density of the water.
3

A man is reported to have fallen overboard and the Officer of the Watch releases the lifebuoy and starts a man overboard manoeuvre, who are the first persons onboard he should inform?

Your answer is correct:

Master and Engine Room.
4

Which of the following figures drawn on the plane of the Meridian is correct for an observer in position Latitude 30° 00′ North; Longitude 15° 00′ West, when observing the sun on the meridian, if the sun’s Declination is 15° 00′ South?

Correct answer:

Figure 4 is correct.

Your Answer:

Figure 3 is correct.
5

What can be used to reduce the effect of the state of sea-water?

Your answer is correct:

Vegetable/Fish Oil.
6

You are approaching the port entrance. What do these lights mean?

Correct answer:

A vessel may proceed only when she has received specific orders to do so.

Your Answer:

A vessel may proceed only when she has received specific orders to do so, except that vessels which can safely navigate outside the main channel need not comply with this message.
7

When navigating using the GPS, how does the GPS display indicate when the accuracy of the displayed position is reduced?

Correct answer:

A large HDOP value is displayed on the screen.

Your Answer:

The GPS display is always very accurate and does not give any indication of lack of accuracy.
8

Which of the following precautions should be taken when work is to be carried out on the radar scanner unit on the mast?

Correct answer:

A “Not to be used” sign on all radars and fuses for the complete radar systems to be removed.

Your Answer:

A sign needs to be attached to all the radars warning the bridge officers of repairs and the fact the radars are “Not to be used”.
9

When plotting a position, where should the Officer of the Watch select as the ships position, when three gyro compass bearings intercept as a triangle (Cocked Hat) and not as a single point?

Correct answer:

At the point nearest to the danger, if any.

Your Answer:

At the point nearest the course line drawn on the chart.
10

The ship is drifting in the open sea with a temporary engine breakdown. The ship is equipped with GPS navigation equipment. What should the bridge Officer of the Watch do in this situation?

Your answer is correct:

All of the possible answers.
11

How will the ship behave if it experiences a complete loss of power (black out) in the situation illustrated?

Your answer is correct:

The vessel will gradually swing to port and the speed will slowly reduce.
12

What is the direction of wind associated with an anticyclone (area of high pressure) in the Northern Hemisphere?

Your answer is correct:

Clockwise around the high pressure.
13

What are the main components causing the magnetic compass to require a regular evaluation and compass correction?

Your answer is correct:

Permanent and induced magnetism in the ships structure.
14

What special equipment can often provide assistance in locating a survival craft or man overboard and in the water?

Your answer is correct:

A SART.
15

You are proceeding along a narrow channel and approaching a bend, on the inside shore of which is a large hill, which obsures your view further up channel. What sound signal will you make to indicate your presence to any vessel that is behind the obstructing hill?

Correct answer:

One prolonged blast.

Your Answer:

Two prolonged blasts.
16

Who is ultimately responsible for approving the voyage plan?

Your answer is correct:

The Master.
17

Two mooring lines are pretensioned equally and have the same length, same breaking strength and same directional load. However, one is made of wire (with a full load elastic elongation of about 1,5 % of its length) and the other made of nylon (with a full load elongation of about 30 % of its length). If a gust of wind increases the load on the lines, how will it be shared?

Your answer is correct:

Wire takes 95 % of the extra load. Rope takes 5 % of the extra load..
18

According to the International Regulations for Preventing Collisions and the illustrated lights, what type of vessel is it?

Your answer is correct:

This vessel is not under command, but is making way through the water.
19

What do the shapes that this vessel is displaying tell us about her?

Correct answer:

That she is not under command.

Your Answer:

That she is constrained by her draught.
20

Which of the four figures illustrated shows the correct position line for the following situation: Latitude 50° 00′ N, Longitude 30° 00′ W, Time 1200 GMT. Course steered: 090° True, Speed: 12 knots, bearing of the sun: 200°, Intercept correction: 00° 02′ Towards (observed altitude – computed altitude).

Correct answer:

Figure 1 is correct.

Your Answer:

Figure 2 is correct.
21

Which approved publication should be used by a seafarer to help overcome any misunderstanding in communications?

Your answer is correct:

The (IMO) Standard Marine Communication Phrases (SMCP) booklet.
22

Two ships travelling in opposite directions are to pass each other in a narrow river, as illustrated. Explain what is likely to happen as they pass each other?

Your answer is correct:

Due to interaction, the bows will repel each other, and then when alongside each other the two ships will be sucked together and finally the sterns will be repelled as they start to pass clear.
23

What actions should be taken by the Officer of the Watch if the ship’s steering system totally fails?

Your answer is correct:

All of the suggested answers.
24

When splicing an eye on a mooring wire (using the recommended 5 full tucks and 2 half tucks) the effective breaking strength of the wire may be affected by the splice. What would be the anticipated change in the breaking strength of the wire?

Correct answer:

A reduction in strength of 10 % to 15 %.

Your Answer:

No reduction in strength.
25

What are the required data inputs into most gyro compasses to reduce any possible compass error?

Your answer is correct:

Latitude and Speed.
26

What is the two letter signal, to be used by flags, radiotelephony or radiotelegraphy, meaning “Calling All Ships”?

Your answer is correct:

CQ.
27

The lights here show those that must be exhibited by a vessel engaged in towing, as per rule 24 of the International Collision Regulations. But how long is the tow behind this vessel?

Your answer is correct:

It exceeds 200 metres.
28

What letter is represented by this flag and what is it’s meaning when displayed by a vessel in port?

Your answer is correct:

P – All persons should report on board as the vessel is about to proceed to sea.
29

The ship is to berth alongside a quay in calm conditions of no wind or current. The ship has a signle fixed pitch right handed propeller. Which angle of approach would be considered the most favourable?

Your answer is correct:

No. 2.
30

What is the correct understanding of the term “bank effect”? If a ship was approaching the bank at an angle, what would be the effect on the ship?

Your answer is correct:

The vessel’s bow is pushed away from the bank.
31

Which is the “CENTRE LINE”, in the figure?

Your answer is correct:

The Fore and aft Centreline is indicated by A, in the figure.
32

What is the correct understanding of the term “Isobar”?

Your answer is correct:

An “Isobar” is a line joining places of equal pressure.
33

Is the location of the Compass Binnacle critical?

Your answer is correct:

Yes, for the reasons stated in all of the suggested answers.
34

The Master arrives on the bridge obviously under the influence of alcohol and states he is taking over the “con” of the ship. What actions should the Officer of the Watch (OOW) take in this situation?

Your answer is correct:

Attempt to diplomatically avoid taking any actions that would put the ship or crew into danger and call the Chief Officer for assistance.
35

If the radar is set onto the Relative Motion Display, what would an echo of a target with no trail indicate? Note this the trail of the echo and not a vector.

Correct answer:

The target is on the same course and speed as own ship.

Your Answer:

The target is on a constant bearing and getting closer to own ship.
36

When should gangway nets be rigged?

Your answer is correct:

Whenever the gangway is rigged.
37

How can an ARPA assist the ship to steer a suitable course to make good the entrance to a channel?

Your answer is correct:

Select ground stabilised true motion display and alter course so that own ships true vector passes through the middle of the entrance to the channel.
38

If a ship requires 2 nautical miles to stop in the water from a “crash stop” when proceeding at full ahead in deep water. What will the stopping distance be in shallow water?

Correct answer:

A greater distance.

Your Answer:

A shorter distance.
39

What is “AIR DRAUGHT”, in the figure?

Your answer is correct:

Air draught is indicated by C, in the figure.
40

You are on a sailing vessel, underway in open water. This vessel is sighted on the starboard bow, on a steady bearing and the distance is closing. By the International Regulations for the Preventing Collisions at Sea, what action will you follow?

Correct answer:

By Rule 18, a power-driven vessel underway shall keep out of the way of a sailing vessel. I will maintain my course and speed, but will continue to monitor situation to ensure the other vessel takes avoiding action.

Your Answer:

Risk of collision is deemed to exist and, as the other vessel is on a steady bearing on my starboard side, I am required to keep out of the way. I will make a broad alteration of course to starboard.
41

The ship is required to be stopped in the water as quickly as possible, but without major changes to the ship’s heading. What is the most effective method to achieve this?

Correct answer:

The use of the rudder hard over both sides combined with reducing engine power, a method known as “high frequency rudder cycling”.

Your Answer:

Put the engine full astern and keep the rudder amidships.
42

In the figure, which letter gives the correct understanding of the term “LENGTH OVERALL”?

Your answer is correct:

Length Overall is indicated by B, in the figure.
43

You are in an area of restricted visibility, close to a port. You hear this signal. What vessel does it come from and what additional information does the signal provide?

Correct answer:

A vessel at anchor, more than 100 metres in length. She is sounding the additional signal to give warning of her position.

Your Answer:

A vessel at anchor, more than 100 metres in length. The additional signal indicates that her cable extends at least 25 metres from her bow.
44

You are on a power-driven vessel underway in open water. You sight these lights on the port bow, on a steady bearing. The distance is closing. What are you looking at and what action will you take in compliance with the International Regulations for Preventing Collision at Sea.

Your answer is correct:

This is a power-driven vessel engaged in towing, less than 50 metres in length, length of tow under 200 metres and the tow, both being restricted in their ability to manoeuvre, seen from the starboard side. Under rule 18, I am required to keep clear and will take appropriate avoiding action.
45

What is the depth of an iceberg below the surface of the sea?

Your answer is correct:

The draught of an iceberg varies with the type of berg and its age.
46

If a mooring winch brake tension is set to 60 tons, the setting has a safely allowance, what would be the maximum breaking load (MBL) of a wire used on the winch?

Your answer is correct:

100 tons.
47

Why should Ground Stabilised True Motion display mode be avoided when using the ARPA for anti-collision purposes?

Correct answer:

The collision regulations are based on ship courses through the water.

Your Answer:

True motion does not provide the collision risk of other ships.
48

The ship is to berth alongside a quay in calm conditions of no wind or current. The ship has a single fixed pitch right handed propeller. Which angle of approach would be considered the most favourable?

Your answer is correct:

No. 2.
49

What is the direction of wind associated with an anticyclone (area of high pressure) in the Northern Hemisphere?

Your answer is correct:

Clockwise around the high pressure.
50

The rudder is hard over with the engine at full ahead. Will the turning effect of the rudder be changed if the engine is stopped?

Correct answer:

Yes, the turning force will be dramatically reduced when the engine is stopped.

Your Answer:

Yes, the turning force will be reduced to about 50 % of the original force when the engine is stopped.
51

What does this signal hoist mean?

Your answer is correct:

I require immediate assistance.
52

The following vessels are all required to make the same sound signal when in or near an area of restricted visibility: a vessel not under command; a vessel restricted in her ability to manoeuvre; a vessel constrained by her draught/a sailing vessel; a vessel engaged in fishing; a vessel engaged in towing or pushing another vessel. What is that signal?

Correct answer:

One prolonged blast, followed by two short blasts, at intervals of not more than 2 minutes.

Your Answer:

Two prolonged blasts, followed by one short blast, at intervals of not more than 2 minutes.
53

The positions of the ship provided by the GPS receiver should always be verified by other means. Which of the following suggested methods would be the most accurate?

Your answer is correct:

Radar ranges of three distinctive shore objects.
54

You are approaching a port in a snowstorm. You hear this signal. What kind of vessel is it and what is it doing?

Your answer is correct:

It comes from a vessel engaged in pilotage duties and it is making way through the water.
55

You are proceeding up a river, with berths on both banks. You see this flag hoist on a vessel moored on a berth ahead. What does it mean?

Correct answer:

You should proceed at slow speed when passing me.

Your Answer:

I am about to depart the berth.
56

If your vessel is fitted with wires on self-stowing “split drum” winches, the advantage of having these split drum winches is:

Your answer is correct:

All the listed alternatives.
57

You are proceeding along a coastal route when you hear this signal. The visibility is severely restricted. What does the signal mean?

Correct answer:

There is a vessel aground in the vicinity. She is more than 100 metres in length. She is sounding an additional warning to approaching vessels that they are “running into danger”.

Your Answer:

There is a vessel at anchor in the vicinity. She is less than 100 metres in length. She is sounding an additional warning to approaching vessels that they are “running into danger”.
58

What is the advantages of a GPS satellite system compared to other navigational aids?

Your answer is correct:

The GPS system gives information about position, speed and time continuously world wide.
59

How can an ARPA assist the ship to steer a suitable course to make good the entrance to a channel?

Correct answer:

Select ground stabilised true motion display and alter course so that own ships true vector passes through the middle of the entrance to the channel.

Your Answer:

Select True ground stabilised vectors and make the vectors from both buoys at the entrance to the channel pass either side of the centre of the screen.
60

When should voyage planning be done?

Correct answer:

Prior to leaving the berth.

Your Answer:

Before the vessel completes the previous passage.
61

You are on a power-driven vessel underway in open water. This vessel is sighted directly ahead. The distance is closing slowly. What action will you take under the International Collision Regulations and why?

Correct answer:

I will maintain my course and speed. The other vessel is being overtaken and is therefore obliged to keep out of the way by rule 13.

Your Answer:

The vessel is on a steady bearing and the distance is closing. I will therefore take avoiding action, altering course to starboard and sounding one short blast under rules 14 and 16.
62

What is understood by the term “Dew point” of the air?

Your answer is correct:

The temperature at which condensation in the air forms into water droplets.
63

Why should a Ground Stabilised True Motion radar display not be used for anti-collision purposes?

Correct answer:

The “aspect” of the target is confused, so the Regulations for Preventing Collisions cannot be accurately applied.

Your Answer:

True motion does not provide the collision risk of targets as only true vectors are available.
64

Which method is used to make a physical connection between a rescue vessel and a wreck?

Your answer is correct:

Rocket line.
65

The ship is navigating in dense fog where the visibility is less than one mile. The Arpa radar is set on a range 12 miles on a course of 314° and own ship has a vector as shown. What is the vector mode selected on the Arpa?

Your answer is correct:

True vectors.
66

You are in an area of restricted visibility and hear this signal. It is repeated at 2 minutes intervals. What does it indicate?

Your answer is correct:

That there is another vessel nearby, that she is underway, but stopped and making no way through the water.
67

Once a ship (equipped with self-stowing auto-tension winches) is moored alongside a loading or discharging berth, how is it recommended that the winches are set?

Your answer is correct:

All winches to be left with the manual brake on and out of gear.
68

When the temperature of the air increases with height it is known as a “Temperature Inversion” and may influence the performance of some instruments on the ship. What should the bridge Officer of the Watch be prepared to happen?

Correct answer:

Abnormal ranges of VHF RT and Second Trace Returns on the radar.

Your Answer:

The radar will be show abnormal sea clutter as the pulse is trapped by the inversion.
69

You are on a power-driven vessel underway in open water. This vessel is sighted on the port bow on a steady bearing. What kind of vessel is it and what will your action be?

Your answer is correct:

This is a sailing vessel underway, seen head-on. It is my responsibility to keep clear under rule 18 and I will take appropriate avoiding action.
70

What are the required data inputs into most gyro compasses to reduce any possible compass error?

Your answer is correct:

Latitude and Speed.
71

Which option best completes the following statement? An operator using ECDIS, will notice an out of position navigation buoy because:

Your answer is correct:

The radar return and ENC buoy symbol will not coincide.
72

What is the purpose of a fire wire?

Correct answer:

A wire for pulling burning ships off the pier.

Your Answer:

A wire for securing the Fire Tug alongside a burning ship.
73

Can anything be done on a vessel with forward speed, to reduce the change in heading caused by a right hand fixed pitch propeller being put astern?

Correct answer:

Yes, the rudder can be put to port.

Your Answer:

The rudder should be put hard to starboard to reduce the water flow to the left side of the propeller.
74

When a ship is lying at anchor in a tidal area using both forward anchors, to what particular aspect should the officer of the watch be paying special attention?

Correct answer:

When the ship swings to the tide the direction of swing should be controlled to avoid the anchor cables becoming wrapped round each other.

Your Answer:

The tension on both cables should be similar, to avoid one dragging and all the weight of the ship remaining on the other anchor only.
75

The IMO Standard Marine Communication Phrases are recommended to be used when the ship’s Officer is verbally talking to whom?

Your answer is correct:

In circumstances described in all of the answers provided.
76

What is important to check when transferring a position from the GPS receiver to a paper chart?

Your answer is correct:

That the chart datum is also WGS84 or there are corrections.
77

In a canal without water flow, if a vessel was approaching a bank at an angle, what would be the probable effect on it?

Your answer is correct:

The vessel’s bow is pushed away from the bank.
78

Can the OOW be the sole lookout?

Correct answer:

During daylight when visibility and traffic allows.

Your Answer:

When the visibility is good and the ship is in the middle of the ocean where there is very little shipping.
79

What would be the stopping distance of a VLCC when proceeding at 8 knots in deep water and the engines are put “Full Astern”?

Correct answer:

Varies, but can be determined from trial data.

Your Answer:

8 nautical miles.
80

During an STS operation with one ship at anchor, should an anchor watch be maintained?

Your answer is correct:

Both ships have normal anchor watch responsibility in addition to watching ship to ship fendering, mooring etc.