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
Total questions on this topic: 209
Your result: 73%
Right answers:
1
How can the effects of Squat be minimized, when a ship is proceeding in shallow water?
Your answer is correct:
Maintain a slow speed just sufficient to maintain steerage.2
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 Relative motion display and make Own Ship vector pass through the middle of the entrance to the channel.3
What is the weather associated with being in the centre of an Anticyclone (a region of High Pressure)?
Your answer is correct:
Light winds and fair weather, sometimes fog.4
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.5
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.6
What are the additional duties required by the Officer of the Watch when navigating in fog?
Your answer is correct:
Sound fog signal, effective radar watch reporting ship movements to Master and keep a good lookout for ships and fog signals.7
What does this signal flag indicate when seen on a vessel in a port approach?
Your answer is correct:
I am in distress and require immediate assistance.8
What are the three possible types of messages seen when there is an ECDIS alert?
Your answer is correct:
Either an Alarm, a Warning or a Caution.9
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.10
What does this flag mean?
Your answer is correct:
I have a diver down; keep well clear at slow speed.11
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.12
The ship’s rudder is full over when the ship’s engines are full ahead. Will the turning effect (lift force) of the rudder be changed when the engine is stopped?
Your answer is correct:
Yes, the lift force will be dramatically reduced when the engines are stopped.13
The ship is involved in a collision, what is the immediate action by the Officer of the Watch after the incident has taken place?
Correct answer:
Sound the General Alarm and stop engines.Your Answer:
Call the Master and check the position for any immediate dangers.14
What would be the effects of a ship passing into shallow water?
Your answer is correct:
The ship is less responsive to both rudder and propeller.15
After passage planning with ECDIS, how should the route be checked for safety?
Correct answer:
Using the ECDIS route checker and by visually sighting all along it.Your Answer:
Investigate the displayed waypoint list after it is printed out.16
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?
Your answer is correct:
A greater distance.17
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:
One prolonged blast, followed by two short blasts, at intervals of not more than 1 minute.18
When should gangway nets be rigged?
Your answer is correct:
Whenever the gangway is rigged.19
What would be considered the most favourable heading of a ship when launching a lifeboat?
Your answer is correct:
The ship should steer about 30° off the prevailing weather and sea with the boat to be launch on the leeside.20
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.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
Why should Ground Stabilised True Motion display mode be avoided when using the ARPA for anti-collision purposes?
Your answer is correct:
The collision regulations are based on ship courses through the water.23
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.24
What could be the reason for the magnetic compass to swing through large angles when the ship is rolling in a seaway?
Your answer is correct:
The heeling error magnets are upside down and/or not in the correct position.25
What is the colour and characteristic of a “towing light”, as defined in the International Regulations for Preventing Collisions at Sea?
Your answer is correct:
Yellow, fixed, seen over an arc of 135° and so arranged as to display 67,5° from right aft on each side of the vessel.26
The bridge Officer of the Watch (OOW) is plotting the ship’s position in the chartroom, when the ship is in collision with a fishing vessel. Why would the OOW be held responsible for the collision?
Your answer is correct:
Under the Rules a proper lookout should be maintained at all times and by all available means.27
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.28
Visual signals are used by aircraft in search and rescue operations to direct ships towards a casualty. The signals shown here are part of a sequence. What does it indicate?
Correct answer:
The assistance of your vessel is no longer required.Your Answer:
The casualty is sighted and will require medical assistance.29
What are we seeing here?
Your answer is correct:
A sailing vessel less than 20 metres in length, displaying the optional combined lantern in lieu of standard sailing lights, seen head-on.30
According to the International Regulations for Preventing Collisions and the illustrated lights, what type of vessel is this and from what direction is it viewed?
Correct answer:
This is a vessel engaged in fishing other than trawling, making way through the water, with outlying gear extending more than 150 metres in the direction of the all-round red light. Looking at it from astern.Your Answer:
This is a vessel engaged in fishing other than trawling, making way through the water, with outlying gear extending more than 150 m in the direction of the all-round white light. Looking at its port side.31
This vessel is sighted ahead and slightly to port. What is her situation? What will you do?
Your answer is correct:
This vessel is aground. I will navigate with extreme caution given the nature of the hazard.32
When navigating using the GPS, how does the GPS display indicate when the accuracy of the displayed position is reduced?
Your answer is correct:
A large HDOP value is displayed on the screen.33
What is the purpose of a sea anchor deployed from a lifeboat?
Your answer is correct:
To keep the lifeboat’s heading against the wind and sea and reduce drift.34
The gyro compass can suffer from a compass error and may need to be allowed for, when steering a course in a dangerous navigational area. What is the probable cause of the error?
Your answer is correct:
An uncorrected course and speed error.35
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 aground in the vicinity. She is less than 100 metres in length. She is sounding an additional warning to approaching vessels to “navigate with extreme caution”.36
What methods could be introduced into a passage plan for continuous monitoring of the ships position when navigating along a coastline?
Correct answer:
Parallel Index lines.Your Answer:
All of the suggested answers.37
If whistles are fitted on a vessel at a distance apart of more than 100 metres, will manoeuvring and warning signals, as defined by rule 34 of the International regulations for Preventing Collisions at Sea, be given on one or both whistles?
Correct answer:
They shall be given on one whistle only.Your Answer:
They shall first be given on the forward whistle, followed by the after whistle, with a 5 second interval in between.38
You are approaching a port in a snowstorm. You hear this signal. What kind of vessel is it and what is it doing?
Correct answer:
It comes from a vessel engaged in pilotage duties and it is making way through the water.Your Answer:
It comes from a vessel restricted in her ability to manoeuvre.39
When navigating along a coastline what should be considered the most accurate method of navigating?
Correct answer:
Use of Differential GPS.Your Answer:
Use of radar ranges and bearings.40
What actions should the Officer of the Watch take when the ship’s steering gear fails?
Your answer is correct:
All of the suggested answers.41
What would be the stopping distance of a VLCC when proceeding at 8 knots in deep water and the engines are put “Full Astern”?
Your answer is correct:
Varies, but can be determined from trial data.42
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?
Your answer is correct:
Figure 4 is correct.43
If a distress signal is received on board your ship, what should be the first action that should be taken?
Correct answer:
Attempt to establish contact with the distressed vessel.Your Answer:
Determine how close your vessel is to the distressed vessel.44
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.45
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.46
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?
Your answer is correct:
Yes, the turning force will be dramatically reduced when the engine is stopped.47
If your vessel is fitted with wires on self-stowing “split drum” winches, the advantage of having these split drum winches is:
Correct answer:
All the listed alternatives.Your Answer:
Less chance of the wire being jammed in the reel.48
Which of the answers best summarises the information which should be provided for the bridge Officer of the Watch within an effective Voyage plan?
Your answer is correct:
All of the suggested answers.49
A ship is navigating in the Caribbean in August when it receives the warning of a Hurricane. To determine the centre of the storm the Master uses “Buys Ballot’s Law” and faces the wind. On what side of the Master would the low pressure area be located?
Your answer is correct:
On the right side.50
What is the correct understanding of the term “Block Coefficient” as applied to a ship?
Your answer is correct:
The comparison of the underwater shape of the ship, to a rectangular block of the same extreme dimensions.51
What is important to check when transferring a position from the GPS receiver to a paper chart?
Correct answer:
That the chart datum is also WGS84 or there are corrections.Your Answer:
Ensure that the chart has been corrected up to date.52
What are the required data inputs into most gyro compasses to reduce any possible compass error?
Correct answer:
Latitude and Speed.Your Answer:
Maximum helm angle and rolling period.53
What is the two letter signal, to be used by flags, radiotelephony or radiotelegraphy, meaning “Calling All Ships”.
Your answer is correct:
CQ.54
What is important to check when transferring a position from the GPS output to a paper chart?
Your answer is correct:
Any necessary corrections are applied to convert between the GPS datum and the chart datum.55
What are the immediate duties of the bridge Officer of the Watch when the ship suddenly runs into a fog bank?
Your answer is correct:
Commence sounding the fog signal, engines on standby, call the Master and lookout, if not already on duty.56
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. 2.57
The Master has decided to “single up” to a spring line at each end as the last lines to let go whilst unmooring. Which of the following methods should be used to hold the lines, whilst waiting for the order to “let go”?
Your answer is correct:
The line should be turned up on the bitts, fig. 1.58
How can the effects of Squat be minimized, when a ship is proceeding in shallow water?
Your answer is correct:
Maintain a slow speed just sufficient to maintain steerage.59
Which of the following hull shapes would normally provide a directionally stable ship?
Correct answer:
A long ship with a narrow beam.Your Answer:
A long ship with a wide beam.60
Which is the “CENTRE LINE”, in the figure?
Your answer is correct:
The Fore and aft Centreline is indicated by A, in the figure.61
The vessel is steaming off the coast when the engine room informs the bridge it must stop engines immediately. Shortly afterwards they informed the bridge they would need a least three hours to fix it. Which of the following actions would be the most suitable taken by the bridge?
Your answer is correct:
Display the NUC signal, maintain the watch and determine how the ship is drifting and the probable position after 3 hours.62
Is the location of a vessel’s standard compass binnacle critical?
Your answer is correct:
Yes, for the reasons stated in all of the suggested answers.63
What would be considered the most favourable heading of a ship when launching a lifeboat?
Your answer is correct:
The ship should steer about 30° off the prevailing weather and sea with the boat to be launch on the leeside.64
You are on a tug and are towing an unmanned barge. You are restricted in your ability to manoeuvre. The total length of the tow is 219 metres. What daylight signals are required by the International Regulations for Preventing Collisions at Sea?
Correct answer:
A diamond shape, where it can best be seen shall be displayed on the tug and the tow. Three shapes shall also be displayed in a vertical line, the upper and lower being balls and the middle one a diamond. Diamond shape.Your Answer:
Three shapes shall be displayed forward on the tug, in a vertical line, the upper and lower being balls and the middle one a diamond.65
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.66
What is the situation of this vessel?
Your answer is correct:
This vessel is not under command, but is making way through the water.67
Rule 12 of the International Collision Regulations prescribes the action to be taken by a sailing vessel when meeting another sailing vessel. This depends on the direction of the wind relative to each vessel. In the situation shown here, which sailing vessel (A or B) must keep out of the way of the other?
Correct answer:
Sailing vessel A must keep out of the way of sailing vessel B.Your Answer:
Sailing vessel B must keep out of the way of sailing vessel A.68
Which of the four calculations illustrated is the correct one to determine the latitude of the observer when the sun is on the meridian?
Correct answer:
Calculation 3 is correct.Your Answer:
Calculation 4 is correct.69
What sound signal shall be used on ship’s whistle when there is a man overboard?
Your answer is correct:
3 long blasts repeatedly.70
The maximum height that a pilot should be required to climb on a pilot ladder before reaching the deck or stepping onto an accommodation ladder platform is:
Correct answer:
9 mtrs.Your Answer:
12 mtrs.71
Is the location of the Compass Binnacle critical?
Your answer is correct:
Yes, for the reasons stated in all of the suggested answers.72
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.73
A balanced rudder has some of the rudder area forward of the rudder axis. About how much area should this be to call it a balanced rudder?
Your answer is correct:
It should be about 20 %.74
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. 2.75
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.76
You are on a power-driven vessel underway in open water. This vessel is sighted wide on the port bow. It’s bearing is opening, but its distance is closing rapidly. Which of the following is a correct assessment of the situation and the action to be taken?
Your answer is correct:
Risk of collision is deemed not to exist and I will maintain my course and speed. I will continue to monitor the situation.77
What is the probable cause of an error in position of the ship obtained from the GPS system?
Your answer is correct:
Incorrect height of the antenna.78
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 furthest away from any danger.79
What is the description for a sidelight, as shown in rule 21 of the International Regulations for Preventing Collisions at Sea?
Your answer is correct:
A green light on the starboard side and red light on the port side, showing an unbroken light over an arc of 112,5°, from right ahead to 22,5° abaft the beam on the respective side.80