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
What is the correct understanding of the term “Isobar”?
Your answer is correct:
An “Isobar” is a line joining places of equal pressure.2
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.3
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?
Your answer is correct:
You should proceed at slow speed when passing me.4
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.5
After passage planning with ECDIS, how should the route be checked for safety?
Your answer is correct:
Using the ECDIS route checker and by visually sighting all along it.6
What is the purpose of a fire wire?
Your answer is correct:
A wire for pulling burning ships off the pier.7
When fastening synthetic fibre ropes such as polypropylene on bitts, for safety and better rope control it is recommended to:
Your answer is correct:
Make two round turns fast on the leading bitt and then figure of eight on both bitts, fig. 4.8
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.9
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.10
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?
Correct answer:
The stern will “back” into the wind and the ship’s heading will swing to starboard.Your Answer:
The stern will fall off to starboard, making the heading swing to port.11
Where would the “pivot point” be considered to be located when the ship is proceeding at full speed ahead and there is no wind or current?
Your answer is correct:
At about 1/6 of the ship’s length from the bow.12
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).13
When navigating along a coastline what should be considered the most accurate method of navigating?
Your answer is correct:
Use of Differential GPS.14
The ship is sailing in shallow water with reduced Under Keel Clearance. If the ship is steaming with the engines at full RPM, what would be the speed in comparison to the speed achieved in deep water?
Your answer is correct:
Slower than deep water.15
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.16
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.17
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.18
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.19
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.20
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.21
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.22
Is the location of the Compass Binnacle critical?
Your answer is correct:
Yes, for the reasons stated in all of the suggested answers.23
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.24
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.25
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.26
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.27
You are in open water and clear conditions. You are approaching the pilot station when you hear this signal from a vessel ahead of you. What does it signify?
Your answer is correct:
That the vessel is operating astern propulsion.28
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.29
Which is the “CENTRE LINE”, in the figure?
Your answer is correct:
The Fore and aft Centreline is indicated by A, in the figure.30
Who is ultimately responsible for the voyage plan?
Your answer is correct:
The Master.31
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.32
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.33
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.34
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.35
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.36
What are the additional duties required by the Officer of the Watch when navigating in fog?
Correct answer:
Sound fog signal, effective radar watch reporting ship movements to Master and keep a good lookout for ships and fog signals.Your Answer:
All of the suggested answers.37
Why should a Ground Stabilised True Motion radar display not be used for anti-collision purposes?
Your answer is correct:
The “aspect” of the target is confused, so the Regulations for Preventing Collisions cannot be accurately applied.38
What does this flag mean?
Your answer is correct:
I have a diver down; keep well clear at slow speed.39
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.40
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.41
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.42
A tug is moving towards the bow of the ship to make fast and is in the vicinity of the ship’s shoulder, as illustrated. What specific danger should be considered when making this approach to the bow?
Your answer is correct:
The tug may be turned across the bow of the ship and also suffer a lose of stability with a danger of being turned over if touched by the ship.43
If a DSC distress alert is received on board your ship, what is the first action that should be taken?
Your answer is correct:
Listen for a distress message on the appropriate radio frequency for five minutes.44
What is the correct understanding of the term “a ship with good Directional Stability”?
Your answer is correct:
A ship moving forwards with the rudder amidships, will continue in a straight line.45
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?
Your answer is correct:
A reduction in strength of 10 % to 15 %.46
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.47
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.48
What sound signal shall be used on ship’s whistle when there is a man overboard?
Your answer is correct:
3 long blasts repeatedly.49
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. 1.50
What does this signal hoist mean?
Your answer is correct:
I require immediate assistance.51
A ship is equipped with a right-handed fixed pitch propeller, which when going from Full Ahead to Full Astern will make the ship sheer to starboard. Can anything be done to reduce this change in heading?
Your answer is correct:
The rudder can be put to Hard to Port to reduce the water from to the right side of the propeller.52
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.53
The tug has been released and is all clear. As officer in charge of that operation, should this be reported and to whom?
Your answer is correct:
Reported all clear to the Bridge.54
Which part of the magnetic compass error changes with a change in the course steered?
Your answer is correct:
Deviation.55
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.56
What possible reason could there be for the identification mark associated with a Racon not being visible on the radar screen?
Your answer is correct:
All of the suggested answers.57
You are in open water and clear conditions. You are approaching the pilot station when you hear this signal from a vessel ahead of you. What does it signify?
Your answer is correct:
That the vessel is operating astern propulsion.58
What is the correct understanding of the term “Block Coefficient” as applied to a ship?
Your answer is correct:
The comparisons of the underwater shape of the ship, to a rectangular block of the same extreme dimensions.59
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.60
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.61
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. 2.62
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.63
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.64
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.65
Which method is used to make a physical connection between a rescue vessel and a wreck?
Your answer is correct:
Rocket line.66
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.67
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.68
Can the OOW be the sole lookout?
Your answer is correct:
During daylight when visibility and traffic allows.69
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.70
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.71
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.72
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.73
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.74
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.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
What is the colour and characteristic of a “towing light”, as defined in the International Regulations for Preventing Collisions at Sea?
Correct answer:
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.Your Answer:
White, fixed, displayed as an additional light on the foremast over an arc of 225°, from right ahead to 22,5° abaft the beam on each side of the vessel.77
What radar device assists in the detection and location of a survival craft?
Your answer is correct:
SART beacon.78
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.79
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.80