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: 95%
Right answers:
1
You are in an area of restricted visibility. You hear this sound signal. What does it mean?
Your answer is correct:
That there is a vessel in distress nearby.2
If a ship in deep water requires 2 nautical miles to “crash stop”, what will be the crash stopping distance in shallow water for the same start speed?
Your answer is correct:
A greater distance.3
What is the situation of this vessel?
Your answer is correct:
This vessel is not under command, but is making way through the water.4
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.5
Where can the size of the Magnetic Compass Error be found?
Your answer is correct:
By taking a transit bearing of two fixed geographical positions and comparing it with the bearing of the same points on the chart.6
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.7
What is correct UTC in this example? Approx. Pos: N49° 51′ W35° 23′, zone +2, Local Time 0900.
Your answer is correct:
11 00.8
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.
Your answer is correct:
The target is on the same course and speed as own ship.9
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.10
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.11
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.12
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.13
What are the required data inputs into most gyro compasses to reduce any possible compass error?
Your answer is correct:
Latitude and Speed.14
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.15
In the Beaufort Scale of Wind Force, what is the Beaufort number associated with the wind force known as a “Gale”? This should not be confused with a “Near Gale” or “Strong Gale”?
Your answer is correct:
Eight (8).16
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?
Your answer is correct:
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.17
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.18
You are proceeding along a coastal route when you hear this signal. The visibility is severely restricted. What does the signal mean?
Your answer is correct:
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”.19
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.20
The ship is involved in a collision, what is the immediate action by the Officer of the Watch after the incident has taken place?
Your answer is correct:
Sound the General Alarm and stop engines.21
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 %.22
Two ships are meeting in a restricted channel as illustrated. Which of the following actions would be the most suitable to take on both vessels as they approach and pass each other?
Your answer is correct:
Slow down if possible without losing steerage and be prepared for prompt application of rudder to counteract any swing as they approach and pass each other.23
Ships vary considerably in design and underwater shape, but does the ship’s trim ever have any influence on its steering abilities?
Your answer is correct:
Yes, the ship often steers better if trimmed by the stern.24
What can be simply rigged to assist a survival craft in keeping alongside own vessel?
Your answer is correct:
A painter rigged fore and aft against the vessel’s side.25
What sound signal shall be used on ship’s whistle when there is a man overboard?
Your answer is correct:
3 long blasts repeatedly.26
What is the correct understanding of the term “a ship with good Directional Stability”?
Your answer is correct:
A ship which when the rudder is left amidships, it will continue on approximately a straight course.27
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.28
What immediate actions should the Officer of the Watch take when the ship goes aground on an uncharted shoal in the middle of the ocean?
Your answer is correct:
Stop engines and call the Master.29
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?
Your answer is correct:
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.30
What corrections must be applied to the echo sounder reading to compare the depth of water with the depth printed on the chart?
Your answer is correct:
Draught of the ship.31
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.32
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?
Your answer is correct:
At the point nearest to the danger, if any.33
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.34
What is “AIR DRAUGHT”, in the figure?
Your answer is correct:
Air draught is indicated by C, in the figure.35
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.36
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.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?
Your answer is correct:
They shall be given on one whistle only.38
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.39
The position of the ship is found by taking a series of bearings using a magnetic compass. How should an error of 5° WEST be applied to the compass bearings?
Your answer is correct:
Subtract 5° to the bearings.40
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.41
Which of the following hull shapes would normally provide a directionally stable ship?
Your answer is correct:
A long ship with a narrow beam.42
What is the correct understanding of the term “Isobar”?
Your answer is correct:
An “Isobar” is a line joining places of equal pressure.43
What radar device assists in the detection and location of a survival craft?
Your answer is correct:
SART beacon.44
What is happening here?
Your answer is correct:
These are two vessels engaged in fishing (pair trawling), showing the additional volutary signals for hauling nets.45
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?
Your answer is correct:
When the ship swings to the tide the direction of swing should be controlled to avoid the anchor cables becoming wrapped round each other.46
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.47
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.48
Which method is used to make a physical connection between a rescue vessel and a wreck?
Your answer is correct:
Rocket line.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?
Correct answer:
On the right side.Your Answer:
On the left side.50
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?
Your answer is correct:
The assistance of your vessel is no longer required.51
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.52
The ship has a single fixed pitch right-handed propeller and is going astern as illustrated. What is the most likely way the ship will react in these circumstances?
Your answer is correct:
The stern will “back” into the wind and the ship’s heading will swing to starboard.53
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.54
What are the two parts of the magnetic compass error?
Your answer is correct:
Variation and Deviation.55
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:
Your answer is correct:
9 mtrs.56
What are the three possible types of messages seen when there is an ECDIS alert?
Correct answer:
Either an Alarm, a Warning or a Caution.Your Answer:
Either an Alarm, a Warning or an Information.57
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.58
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.59
The maximum rudder angle on your ship is 35°. Do you think this is the angle that the rudder is most effective?
Correct answer:
No, the most effective rudder angle is about 25 to 30°, this is because the rudder is stalling at 35° angle.Your Answer:
No, the rudder is most effective at angles between 10 and 20°.60
Which statement best describes how land moves, if at all, on an ECDIS set in North-up, relative motion mode?
Your answer is correct:
Land on the chart screen moves relative to the ship symbol.61
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.62
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.63
When making a new pilot ladder onboard the ship, which of the following ropes would be best suited as the side ropes on which the steps are fastened?
Your answer is correct:
Uncovered manila rope.64
In the diagram, the amount of water under the keel is indicated by the letter “C”. Which bridge instrument would measure this value?
Your answer is correct:
Echo Sounder.65
This vessel is encountered at the mouth of a river. According to the International Regulations for Preventing Collisions and the illustrated shapes, what type of vessel is it?
Your answer is correct:
This is a vessel engaged in dredging or underwater operations. The two balls in a vertical line indicate the side on which an obstruction exists; the two diamonds in a vertical line indicate the side on which it is safe to pass; the ball/diamond/ ball in a vertical line indicate that the vessel is restricted in her ability to manoeuvre.66
What are the main advantages to the Navstar, Glonas and Galileo satellite navigation systems?
Your answer is correct:
These satellite systems give world-wide coverage 24 hours a day.67
The position of the ship provided by the GPS should always be confirmed by other means, when possible. Which of the following suggested methods would be the most accurate?
Your answer is correct:
The ranges of three distinctive shore objects on the radar.68
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?
Your answer is correct:
The use of the rudder hard over both sides combined with reducing engine power, a method known as “high frequency rudder cycling”.69
Who is responsible for the number and the position of any tugs to be used during a mooring operation?
Your answer is correct:
The Master, with consideration of the advice of the pilot.70
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.71
What is “AIR DRAUGHT”, in the figure?
Your answer is correct:
Air draught is indicated by C, in the figure.72
Which type of vessel suffers from the greatest squat effects?
Your answer is correct:
Vessel with a high Block Coefficient.73
Which of the following precautions should be taken when work is to be carried out on the radar scanner unit on the mast?
Your answer is correct:
A “Not to be used” sign on all radars and fuses for the complete radar systems to be removed.74
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.75
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.76
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.77
What is the purpose of a fire wire?
Your answer is correct:
A wire for pulling burning ships off the pier.78
The ship has a right-handed propeller and is swinging to starboard when the engines are slow ahead and the rudder is to starboard. The engines are stopped and the rate of swing rapidly slows down. How could the swing to starboard be maintained without the ship making much headway.
Your answer is correct:
Astern on the engines will allow Transverse Thrust to continue the swing.79
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..80