Тест для Officers onboard about Navigation, Operational Level (CES v6.0)

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The test consisted of 80 random questions.
Total questions on this topic: 158

Your result: 100%

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Right answers:

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

Your answer is correct: The vessel will gradually swing to port and the speed will slowly reduce.

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.

What methods could be introduced into a passage plan for continuous monitoring of the ships position when navigating along a coastline?:

Your answer is correct: Parallel Index lines.

What are the two parts of the magnetic compass error?:

Your answer is correct: Variation and Deviation.

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.

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.

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?:

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

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.

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.

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.

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.

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

Your answer is correct: Latitude and Speed.

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.

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.

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.

What, by definition in the International Collision Regulations, is a “vessel restricted in her ability to manoeuvre”?:

Your answer is correct: A vessel which from the nature of her work is restricted in her ability to manoeuvre as required by the Rules and is therefore unable to keep out of the way of another vessel.

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?:

Your answer is correct: One prolonged blast, followed by two short blasts, at intervals of not more than 2 minutes.

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.

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..

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.

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.

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).

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.

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”.

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

Your answer is correct: An “Isobar” is a line joining places of equal pressure.

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.

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.

What is the purpose of a sea anchor?:

Your answer is correct: To keep the lifeboat steady against the sea/wind.

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.

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”.

A ship is being overtaken by another ship while proceeding along a river. What should be the required procedure?:

Your answer is correct: The overtaking vessel should request permission from the other ship by sounding two prolonged blasts followed by two short blasts on the whistle or by direct VHF contact.

You are proceeding along a narrow channel in front of another vessel, both heading for port. You hear this signal from the vessel behind you. What does it mean?:

Your answer is correct: I intend to overtake you on your port side.

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.

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.

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.

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.

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.

Which part of the magnetic compass error changes with a change in the course steered?:

Your answer is correct: Deviation.

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.

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.

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.

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.

What is correct UTC in this example? Approx. Pos: N49° 51′ W35° 23′, zone +2, Local Time 0900.:

Your answer is correct: 11 00.

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.

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?:

Your answer is correct: Abnormal ranges of VHF RT and Second Trace Returns on the radar.

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 %.

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.

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.

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.

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.

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.

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.

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.

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.

Is the location of the Compass Binnacle critical?:

Your answer is correct: Yes, for the reasons stated in all of the suggested answers.

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.

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.

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.

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.

Where can a ship expect an act of piracy to take place?:

Your answer is correct: All over the world.

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.

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.

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?:

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.

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.

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.

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.

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.

When navigating along a coastline what should be considered the most accurate method of navigating?:

Your answer is correct: Use of Differential GPS.

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.

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.

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.

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.

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.

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.

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.

Is the location of the Compass Binnacle critical?:

Your answer is correct: Yes, for the reasons stated in all of the suggested answers.

What is “AIR DRAUGHT”, in the figure?:

Your answer is correct: Air draught is indicated by C, in the figure.

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.

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

Your answer is correct: That she is not under command.

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