Home Online tests CES All types of vessels 2nd-Off / 3rd-Off Test for Officers onboard about Navigation, Operational Level (CES v6.0)

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

You can start the test

Select the test mode:

Education

Passing the test

Online test

Description

Reviews

The test consists of 80 random questions.
Total questions on this topic: 209

Question 1 from 80

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

The chart datum is correct for the area the vessel is located.

That it is a “2D” fix and the antenna height is set correctly.

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

Ensure that the chart has been corrected up to date.

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.

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.

This is a power-driven vessel, more than 50 metres in length or less than 50 metres in length and showing a second masthead light, restricted in her ability to manoeuvre. The sidelight of a second vessel can be seen beyond her. Under rule 18, I am obliged to keep clear of the first vessel and will therefore take appropriate avoiding action.

I don’t know.

This is a power-driven vessel engaged in towing, more than 50 metres in length or less than 50 metres in length and showing a second masthead light, length of tow 200 metres or more, not under command. I will keep clear under rule 27.

What does this signal flag indicate when seen on a vessel in a port approach?

Keep clear. I have divers down.

I require a pilot.

I am in distress and require immediate assistance.

I require medical assistance.

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

Standard Marine Navigational Vocabulary.

The Oxford Concise Dictionary.

The (ISC) Bridge Procedures Guide.

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

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?

At a position near the stern of the ship.

At amidships.

At about 1/6 of the ship’s length from the stern.

At about 1/6 of the ship’s length from the bow.

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.

Transverse Thrust will reduce the swing and therefore a kick ahead is necessary with full starboard helm applied.

The only effective method is by using the bow thruster to push the bow to starboard.

Astern on the engines will allow Transverse Thrust to continue the swing.

By applying the rudder hard over to starboard and going ahead on the engines.

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.

The target is stopped and making no way through the water.

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

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

The target is on a collision course with own ship.

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

AS.

TT.

CQ.

CA.

What is the purpose of a sea anchor deployed from a lifeboat?

To hold the lifeboat in position with other survival craft.

To keep the lifeboat’s heading against the wind and sea and reduce drift.

To keep the lifeboat in a position close to the vessel.

To give a better signal to any aircraft searching for survivors.

What are the immediate duties of the bridge Officer of the Watch when the ship suddenly runs into a fog bank?

Commence sounding the fog signal, engines on standby, call the Master and lookout, if not already on duty.

Commence sounding the fog signal and reduce speed to Slow Ahead.

Commence sounding the fog signal and call the Master and wait for him to arrive before taking any further actions.

Commence sounding the fog signal and if the radar indicates no echoes in the vicinity, proceed at the normal speed until ships are detected on the radar or until the fog lifts.

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?

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

Tell the Master you do not think this is a good idea and retain control of the watch.

Tell the Master you consider him incapable of taking over the responsibility of the watch and that he should retire to his cabin and sleep it off.

Watch the actions made by the Master and if not dangerous, wait until the Master becomes more capable to take control or leaves the bridge.

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

All of the data in the suggested answers.

Latitude and Speed.

Maximum helm angle and rolling period.

Deviation and Variation.

What is happening here?

These are two vessels engaged in fishing (pair trawling), showing the additional voluntary signals for shooting nets.

These are two vessels engaged in fishing (pair trawling), showing the additional volutary signals for hauling nets.

This is a vessel engaged in towing a disabled tow, restricted in its ability to manoeuvre, with a searchlight used to highlight the location of the tow.

These are two vessels engaged in fishing, using purse-seine gear. The searchlights are simply working lights.

How can a new officer, just boarding a ship, ensure that he knows the location and operation of all navigational and safety equipment and take account of the operating limitations of such equipment?

By following the standard company Induction procedures for a bridge watchkeeping officer.

By using the equipment on regular watchkeeping duties.

The certificate of competency will ensure the officer has suitable competence in operating the bridge equipment.

By asking other officers and practicing with the use of the equipment.

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

Use of radar ranges and bearings.

Passing close to navigational buoys.

Use of Differential GPS.

Bearings of navigational shore marks such as lighthouses.

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?

True vectors.

Relative vectors, ground stabilised.

Relative vectors.

Relative vectors, sea stabilised.

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?

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.

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.

Risk of collision is deemed to exist and, as the other vessel is on a steady bearing on my starboard side, I will maintain my course and speed.

This vessel is clearly a power-driven vessel and I anticipate that the bearing will therefore close and she will pass ahead at a safe distance.

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

It comes from a vessel at anchor, less than 100 metres in length.

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

It comes from a vessel engaged in pilotage duties at anchor, over 100 metres in length.

It comes from a vessel restricted in her ability to manoeuvre.

What corrections must be applied to the echo sounder reading to compare the depth of water with the depth printed on the chart?

Shallow water effects.

The distance between the pulse Transmitter and Receiver.

Draught of the ship.

Allowance for the ships speed.

In an extreme case, in addition to having your winch brakes as tight as can be, you can increase the brake holding capacity of the winch drum by putting it in gear and setting the power to the “heave” position. However this may cause:

All the listed alternatives.

The increased braking power of the winch to exceed the breaking strength of the wire and rope paid out from it which might cause the wire or rope to part.

Strain on the fairleads and rollers in use in excess of their Safe Working Load.

Damage to the winch by distorting the shaft.

What sound signal can be made when nearing a bend in a river, with the view around the bend obscured by an intervening obstruction?

Two short blasts.

One prolonged blast.

Two prolonged blasts.

One short blast.

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?

Bearing and distance from a navigational buoy.

Radar bearings of three distinctive shore objects.

Radar ranges of three distinctive shore objects.

A DR updated position from the last reliable one.

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?

That the vessel is altering his course to starboard.

That the vessel is operating astern propulsion.

That the vessel is picking up his pilot.

That the vessel is starting his engine and resuming his passage.

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?

The Master only.

The crew quarters for extra lookouts.

Master and Engine Room.

Chief Officer and lifeboat party.

What does this flag mean?

I wish to communicate with you.

My vessel is stopped and making no way through the water.

Yes (affirmative).

I have a diver down; keep well clear at slow speed.

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?

The same as deep water.

Slower than deep water.

Faster than deep water.

It would be very difficult to maintain full deep sea RPM on the engines and therefore difficult to assess the speed.

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?

It is less than 200 metres.

It exceeds 200 metres.

At least 100 metres.

It is more than 50 metres but less than 200 metres.

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

Any necessary corrections are applied to convert between the GPS datum and the chart datum.

Ensure that the chart has been corrected up to date.

Ensure that the GPS is setup on the same datum as the chart.

It is important to ensure that the GPS is setup on 2 dimensional and not 3 dimensional position fixes.

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?

It is less than 200 metres.

It exceeds 200 metres.

It is more than 50 metres but less than 200 metres.

At least 100 metres.

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?

At the point furthest away from any danger.

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

At the point nearest to the danger, if any.

At the centre of the triangle.

What is the correct understanding of the term “a ship with good Directional Stability”?

A ship which when the rudder is left amidships, it will continue on approximately a straight course.

A ship which when a rudder angle is applied and the ship starts to swing, will continue to swing even after the rudder is returned to amidships.

A ship which will maintain its course unless large rudder angles are applied.

A ship where the amount of positive transverse stability (GM) will vary with the direction of the ship’s head.

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

Parallel Index lines.

Conspicuous headlands and navigational marks for taking positions.

The radar ranges of the coastline at all course alteration points.

All of the suggested answers.

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?

The positive pressure field at the ships bow may repel the tug and make the connection very difficult to establish.

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.

The stern of the tug may be sucked in towards the bow and also suffer a reduction in the positive GM, making it very unstable.

All of the alternative answers.

What is “AIR DRAUGHT”, in the figure?

Air draught is indicated by A, in the figure.

Air draught is indicated by D, in the figure.

Air draught is indicated by C, in the figure.

Air draught is indicated by B, in the figure.

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?

The rudder should be kept amidships when going astern and there is little that can be done to reduce the swing to starboard.

The rudder can be put from side to side in a “Rudder Cycling” movement.

The rudder can be put to Hard to Port to reduce the water from to the right side of the propeller.

The rudder should be put Hard to Port to reduce the water flow to the left side of the propeller.

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

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

S – I am operating astern propulsion.

P – I require a pilot.

W – All persons should report onboard as the vessel is about to proceed to sea.

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

All of the suggested answers.

Deviation.

Variation.

Induced magnetism.

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

The wind will push the vessel sideways, but the heading will not change.

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

The vessel will continue on course and the speed will slowly reduce.

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

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?

That the vessel is picking up his pilot.

That the vessel is altering his course to starboard.

That the vessel is starting his engine and resuming his passage.

That the vessel is operating astern propulsion.

Which of the following answers correctly specify the following most common rudders? a) UNBALANCED, b) BALANCED, c) SEMI-BALANCED and d) UNDERHUNG BALANCED. i. e. The number in the picture is related to the letter adjacent to the name of the rudder.

1 = d, 2 = a, 3 = b and 4 = c.

1 = b, 2 = c, 3 = d and 4 = a.

1 = a, 2 = b, 3 = c and 4 = d.

1 = c, 2 = d, 3 = a and 4 = b.

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?

Maintain speed and a straight course on the starboard side of the channel.

Keep as far as possible on the starboard side of the channel and maintain speed to retain effective steerage.

Increase speed slightly to pass each other as quickly as possible and thereby reduce the effects of “ship to ship” interaction.

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.

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

Increased brake holding capacity due to the ability to keep the paid out wire in a single layer on the drum.

Less chance of the wire being jammed in the reel.

No crushing of the wire.

All the listed alternatives.

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

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

That there is another vessel nearby, but that she is at anchor.

That there are two more vessels nearby.

That there is another vessel in the vicinity and that she has just altered course to port.

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?

A reduction in strength of 1 % to 5 %.

A reduction in strength of 10 % to 15 %.

A reduction in strength of 30 % to 40 %.

No reduction in strength.

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?

Yes, the lift or turning force will be reduced to about 50 % of the original lift force when the engines are stopped.

Yes, the lift force will be dramatically reduced when the engines are stopped.

No, the lift force is unaffected by the speed of the propeller.

No, the turning force applied by the rudder will be maintained within about 90 % of the lift force when going full ahead.

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?

Similar distance to deep water.

A greater distance.

A shorter distance.

Depends on the crash stop used.

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

Clockwise around the high pressure.

Anticlockwise around the high pressure.

Straight towards the centre of the anticyclone.

Directly away from the centre of the anticyclone towards the nearest low pressure.

Which of the answers best summarises the information which should be provided for the bridge Officer of the Watch within an effective Voyage plan?

All of the suggested answers.

Expected prevailing wind and weather.

Contingency arrangements in case of problems.

Courses to steer; distance off dangers; parallel index lines; expected currents; prevailing winds; distance between alteration points.

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

07 00.

11 00.

23 00.

19 00.

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”?

Ten (10).

Seven (7).

Eight (8).

Nine (9).

What is the purpose of a sea anchor?

To keep the lifeboat in a position close to the vessel.

To adjust the drifting speed of the lifeboat.

To give a better signals to any aircraft searching for survivors.

To keep the lifeboat steady against the sea/wind.

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?

The assistance of your vessel is no longer required.

The casualty is sighted and will require medical assistance.

The aircraft is short on fuel and is returning to base.

The aircraft is directing a vessel towards the casualty.

What are the additional duties required by the Officer of the Watch when navigating in fog?

Sound fog signal, effective radar watch reporting ship movements to Master and keep a good lookout for ships and fog signals.

All of the suggested answers.

Sound fog signal, plot positions and keep a good lookout.

When navigating in fog the Master will take over the watch and the Officer of the Watch should follow all of his instructions.

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).

Figure 2 is correct.

Figure 4 is correct.

Figure 3 is correct.

Figure 1 is correct.

Where can the size of the Magnetic Compass Error be found?

By taking the error from the Deviation Table on the bridge.

By taking a transit bearing of two fixed geographical positions and comparing it with the bearing of the same points on the chart.

On the chart in the centre of the compass rose or by reference to the Variation chart, taking into account the annual changes.

By reference to the last entry in the Compass Error Log Book.

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

Vegetable/Fish Oil.

Foam.

Crude Oil.

Fuel Oil.

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

TT.

CQ.

CA.

AS.

What possible reason could there be for the identification mark associated with a Racon not being visible on the radar screen?

All of the suggested answers.

The Racon may not be transmitting a pulse.

The radar may be suppressing the mark with application of the Interference Rejection control.

The transmitted radar frequency may not trigger the Racon transmitter.

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

Straight towards the centre of the anticyclone.

Directly away from the centre of the anticyclone towards the nearest Low pressure.

Anticlockwise around the high pressure.

Clockwise around the high pressure.

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?

On the right side.

This is not a suitable method to use with a Hurricane.

On the left side.

Straight ahead.

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?

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.

A diamond shape, where it can best be seen, on the tug only. Three shapes shall also be displayed, being three balls in a vertical line.

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.

Three shapes shall be displayed on the tug, where they can best be seen, in a vertical line, the upper and lower being balls and the middle one a cylinder. The signal flag “T” shall also be flown on the tug. A diamond shall be displayed aft on the tow.

According to rule 12 of the International Regulations for Preventing Collisions, in the situation illustrated, which sailing vessel (A or B) must keep out of the way of the other?

Sailing vessel A must out of the way of sailing vessel B.

Both sailing vessels are required to take avoiding action.

Sailing vessel B must out of the way of sailing vessel A.

The upwind sailing vessel must keep out of the way of the downwind sailing vessel.

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?

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

No, the turning force applied by the rudder will be maintained within about 90 % of the turning force when going full ahead.

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

No, the turning force is unaffected by the speed of the propeller.

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

The draught of an iceberg is normally about 3/4 of its total depth.

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

The depth of an iceberg below the surface is always about one sixth of its total depth.

The draught of an iceberg is about the same as the visible part of the iceberg above the water.

What are the two parts of the magnetic compass error?

Permanent and induced magnetism.

West and East errors.

Variation and Deviation.

The latitude and longitude.

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?

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

One prolonged blast, followed by two short blasts, at intervals of not more than 1 minute.

One prolonged blast at intervals at not more than 2 minutes.

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

Who is ultimately responsible for approving the voyage plan?

The Officer of the Watch (OOW) on duty.

The Second Officer as the official Navigation Officer.

The ship owner will provide overall parameters within which the ship must follow.

The Master.

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

Length Overall is indicated by D, in the figure.

Length Overall is indicated by C, in the figure.

Length Overall is indicated by B, in the figure.

Length Overall is indicated by A, in the figure.

When should gangway nets be rigged?

When it is deemed necessary by the Master of the Chief Officer.

Whenever the gangway is rigged.

Between sunset and sunrise.

Whenever the gangway is regarded as unsafe.

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?

No, the rudder should be kept amidships when going astern and there is little that can be done to reduce the swing to starboard.

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

Yes, the rudder can be put to port.

The rudder can be cycled from side to side.

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

Sputnik line.

Rocket line.

Cosmos line.

Heaving line.

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?

Risk of collision is deemed to exist and I will make a broad alteration of course to starboard, sounding one short blast. I will re-assess the situation when the alteration is carried out.

Risk of collision is deemed not to exist. However, to be sure of a safe passing distance, I will reduce my speed to allow the other vessel to pass ahead.

Risk of collision is a possibility. I will maintain my course and speed for now, but be prepared for an alteration of course to port if the CPA seems to be less than 0,2 nm as we draw closer.

Risk of collision is deemed not to exist and I will maintain my course and speed. I will continue to monitor the situation.

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?

Figure 4 is correct.

Figure 2 is correct.

Figure 3 is correct.

Figure 1 is correct.

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

The temperature of the water vapour in a cloud.

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

All of the suggested answers.

The “Dew point” is the point at the centre of an Anticyclone.

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

8 nautical miles.

Varies, but can be determined from trial data.

15 ship lengths.

4 nautical miles.

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

All of the suggested answers.

The “Dew Point” is the point at the centre of an Anticyclone.

The temperature of the water vapour in a cloud.

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

Is the location of a vessel’s standard compass binnacle critical?

Yes, it should be on the fore and aft centreline of the ship.

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

Yes, it should be sited on a non-metallic base if possible.

Yes, it should be away from major electrical power cables.

What are we seeing here?

A sailing vessel of less than 10 metres in length, displaying the mandatory combined lantern in lieu of sailing lights, seen head-on.

A sailing vessel, seen from astern, where the edges of her sidelights are both visible.

A sailing vessel less than 20 metres in length, displaying the optional combined lantern in lieu of standard sailing lights, seen head-on.

A sailing vessel, at anchor.

Is the location of the Compass Binnacle critical?

Yes, it should be on the fore and aft centreline of the ship.

Yes, it should be sited on a non-metallic base if possible.

Yes, it should be away from all electrical power cables.

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

What is the correct understanding of the term “Block Coefficient” as applied to a ship?

The restriction of a valve in a pipe to the flow of fluid through that pipe.

The coefficient of a Block and Tackle.

The comparison of the underwater shape of the ship, to a rectangular block of the same extreme dimensions.

The ratio of the water plane shape of the ship to a rectangle of the same extreme dimensions.

The «Navigation (NA) Operational Level» subject covers both theoretical and practical knowledge regarding safety when working with electrical equipment. Mastery of this information is a key indicator of an employee's competence in their specific role on a vessel. As a 3rd officer responsible for navigation duties, your primary tasks include assisting senior officers in planning the ship’s voyage by calculating safe passage routes, preparing navigation charts, and monitoring weather conditions. You are also responsible for conducting regular safety checks on all life-saving equipment to ensure it is in good working order, as well as operating and maintaining navigational equipment like radar, GPS, and compasses to ensure they are functioning correctly.

Version: 4.1, 5.0, 5.1, 6.0.0.
Test type: STCW.
Duty: 3rd Officer.
Level: Operational.
Theme: Navigation.

Only seamen can leave reviews. To leave a review, log in to the site with a seaman's account.

Be the first to review this online test!