I85PREP
⌘ K
EU Boatmaster (Hungary) study materials
EU Boatmaster (Hungary) study resources

EU Boatmaster (Hungary) practice questions

One question at a time. Build your EU Boatmaster (Hungary) understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Navigation and seamanship (inland and coastal waters)

On an inland waterway, you see a vessel displaying one blue cone pointing downwards during the day. What does this signal indicate?

  1. The vessel is carrying dangerous goods and must be given a wide berth
  2. The vessel is a ferry crossing the fairway and has priority
  3. The vessel has a hazardous cargo and is required to show this signal by day Correct answer.
  4. The vessel is aground and requests immediate assistance

Explanation

Under CEVNI and the Danube regulations a vessel carrying certain hazardous or polluting goods shows a blue cone (apex down) by day and a blue light by night so other traffic can recognise the risk. It is a status signal about the cargo, not a distress or priority signal.

Question 2Navigation and seamanship (inland and coastal waters)

Which light configuration identifies a vessel engaged in pushing at night on an inland waterway?

  1. Three white masthead lights in a vertical line plus sidelights
  2. A single all-round red light above a white light
  3. Two all-round red lights in a vertical line
  4. Two masthead lights, one above the other, plus sidelights and stern light Correct answer.

Explanation

A power-driven vessel under way, including one pushing ahead, shows two masthead lights in a vertical line where the length requires it, together with sidelights and a stern light. The pushed convoy itself carries additional lights depending on its breadth.

Question 3Navigation and seamanship (inland and coastal waters)

You are proceeding downstream on a river and meet an upstream vessel head-on near a bridge opening. Which principle governs the passing arrangement?

  1. Both vessels pass port side to port side unless a different arrangement is agreed by radiotelephone Correct answer.
  2. The larger vessel chooses the side and the smaller must comply
  3. The vessel with the current behind it must always pass on the starboard side
  4. The upstream vessel always has the right of way and the downstream vessel must stop

Explanation

On inland waterways the general meeting rule is port side to port side, that is each vessel leaves the other to its port side. A different arrangement can be agreed by radiotelephone, especially at narrow bridge openings where the fairway is restricted.

Question 4Navigation and seamanship (inland and coastal waters)

What is the meaning of a yellow buoy showing a yellow flashing light in the fairway of a regulated river?

  1. It marks a wreck that must be passed on the port side
  2. It marks a special area such as a prohibited or restricted zone or a pipeline crossing Correct answer.
  3. It marks the position of a lock waiting berth
  4. It marks the starboard edge of the navigable channel for downstream traffic

Explanation

Yellow buoys with yellow flashing lights are special marks used to indicate areas such as prohibited zones, pipeline crossings, mooring restrictions or other special features. They are not lateral channel marks.

Question 5Navigation and seamanship (inland and coastal waters)

When entering a lock chamber in a convoy, what is the correct procedure for securing your vessel?

  1. Drop anchor inside the chamber to prevent drifting
  2. Tie the vessel only to the vessel ahead and switch off all lights
  3. Moor to the bollards or floating bitts as directed, take a turn and tend the lines as the water level changes Correct answer.
  4. Keep the engine running in gear and hold position against the lock gate

Explanation

In a lock the vessel is made fast to the chamber bollards or floating bitts with adequate line length so the lines can be tended as the water level rises or falls. The engine is kept ready but not used to push against gates, and anchoring inside the chamber is prohibited.

Question 6Navigation and seamanship (inland and coastal waters)

Which document must be on board and available for inspection when operating a vessel on Hungarian inland waterways?

  1. The charterer's bank guarantee
  2. The captain's private health insurance policy
  3. The ship's certificate of registry or inland navigation certificate for the vessel Correct answer.
  4. The crew's employment contracts

Explanation

The vessel must carry its certificate of registry or inland navigation certificate, which proves identity, tonnage and permitted operating limits. This is the document an inspector will ask for first, together with the crew certificates and logbook.

Question 7Navigation and seamanship (inland and coastal waters)

A red flag waved rapidly in a circle by a vessel on the water signals what?

  1. The vessel is about to leave its berth
  2. The vessel is in distress and requires assistance Correct answer.
  3. The vessel is requesting a pilot
  4. The vessel is turning to starboard

Explanation

Rapid circular waving of a red flag is a recognised distress signal under the international and inland signal codes. It indicates the vessel needs immediate help, and any vessel observing it must respond or relay the message.

Question 8Navigation and seamanship (inland and coastal waters)

What does one short blast sounded by a power-driven vessel under way mean on an inland waterway?

  1. I intend to overtake on your starboard side
  2. I am altering my course to port
  3. I am going astern
  4. I am altering my course to starboard Correct answer.

Explanation

In the inland sound signals one short blast means the vessel is altering course to starboard. Two short blasts mean altering to port, and three short blasts mean the engines are going astern.

Question 9Navigation and seamanship (inland and coastal waters)

You are overtaking a slower vessel on a river. Which sound signal sequence indicates that you intend to overtake on the other vessel's port side?

  1. Three short blasts
  2. Two prolonged blasts followed by one short blast
  3. One prolonged blast followed by one short blast
  4. Two prolonged blasts followed by two short blasts Correct answer.

Explanation

In the inland overtaking signals two prolonged blasts followed by two short blasts mean the overtaking vessel wishes to pass on the other vessel's port side. Two prolonged blasts followed by one short blast would mean passing on the starboard side.

Question 10Navigation and seamanship (inland and coastal waters)

Which of the following best describes the term 'fairway' on an inland waterway?

  1. The zone reserved for angling and recreation
  2. The part of the waterway reserved for moored vessels
  3. The area between the bank and the towpath
  4. The navigable part of the waterway that vessels normally use for passage Correct answer.

Explanation

The fairway is the section of the waterway that is kept navigable and normally used by vessels for passage. Other areas such as mooring zones, angling areas and shallow margins are outside the fairway.

Question 11Navigation and seamanship (inland and coastal waters)

You are approaching a bridge with a single navigable opening marked by a red and green light pair. What does the pair of lights tell you?

  1. The lights indicate the water depth in the opening
  2. Both lights on means the opening is closed to all traffic
  3. The opening is clear and you may pass between the lights Correct answer.
  4. The opening is reserved for upstream traffic only

Explanation

At bridge openings a green light indicates the passage is clear and a red light indicates it is closed. When both are shown in a pair arrangement, they delimit the navigable opening and confirm the passage is clear for the direction permitted.

Question 12Navigation and seamanship (inland and coastal waters)

What is the purpose of the 'blue board' (blue sign with white arrow) seen on some inland waterway structures?

  1. It marks a prohibited anchorage
  2. It shows the maximum permitted speed
  3. It indicates the direction of the fairway and the side to be passed Correct answer.
  4. It indicates a customs control point

Explanation

Blue boards with white arrows are information signs that indicate the direction of the fairway or the side on which a structure should be passed. They help the navigator keep to the correct side in constricted sections.

Question 13Navigation and seamanship (inland and coastal waters)

A vessel is showing two black balls in a vertical line by day. What does this indicate?

  1. The vessel is constrained by its draught
  2. The vessel is not under command Correct answer.
  3. The vessel is at anchor
  4. The vessel is a fishing vessel trawling

Explanation

Two black balls in a vertical line are the daytime signal for a vessel not under command, meaning it cannot manoeuvre as required. At night the equivalent is two all-round red lights in a vertical line.

Question 14Navigation and seamanship (inland and coastal waters)

When navigating a narrow canal section, which action best reduces the risk of bank suction and interaction with an oncoming vessel?

  1. Steer sharply towards the bank to make room
  2. Sound one long blast and maintain full speed
  3. Increase speed to pass quickly and keep close to the bank
  4. Reduce speed, keep to the centre of the fairway and maintain a steady course Correct answer.

Explanation

In narrow sections, reducing speed limits the squat and bank effect, while keeping to the centre gives both vessels room to pass. Abrupt helm movements worsen interaction and can pull the vessel towards the bank.

Question 15Navigation and seamanship (inland and coastal waters)

What is 'squat' and how does it affect a vessel in shallow water?

  1. The reduction of under-keel clearance and the bodily sinking of the vessel as speed increases in shallow water Correct answer.
  2. The tendency of the bow to rise as speed increases in deep water
  3. The sideways drift caused by wind on the superstructure
  4. The increase in draught caused by loading cargo

Explanation

Squat is the sinking of the hull and change of trim caused by the flow of water around a moving vessel, and it is most pronounced in shallow or restricted water. It reduces under-keel clearance, so speed must be reduced in shallow sections.

Question 16Navigation and seamanship (inland and coastal waters)

In a river with a strong cross-current at a bend, what is the safest approach for a downstream vessel?

  1. Hug the inside of the bend at full speed
  2. Steer towards the outside of the bend early and reduce speed to keep control Correct answer.
  3. Turn the vessel to face upstream before entering the bend
  4. Stop and wait for the current to ease

Explanation

At a bend the current is strongest on the outside, so the vessel should be positioned early and speed reduced to retain steering control and avoid being set onto the outer bank. Turning upstream in a narrow bend is dangerous.

Question 17Navigation and seamanship (inland and coastal waters)

Which of the following describes the correct use of a lead line or echo sounder when checking depth while under way?

  1. Use the echo sounder only when the vessel is stopped
  2. Ignore the sounder if the chart shows deep water
  3. Take soundings at regular intervals and compare them with the charted depth and the predicted water level Correct answer.
  4. Take one sounding at the start of the voyage and rely on it

Explanation

Depths must be monitored continuously or at regular intervals and compared with the charted depth corrected for the current water level. A single sounding at departure becomes invalid as the vessel moves into different sections.

Question 18Navigation and seamanship (inland and coastal waters)

What is the correct action if your vessel runs aground in a fairway and blocks part of the channel?

  1. Display the prescribed aground signals, warn approaching traffic by radiotelephone and VHF, and inform the competent authority Correct answer.
  2. Abandon the vessel immediately without notifying anyone
  3. Reverse at full power without checking for damage
  4. Wait silently until a patrol arrives

Explanation

A grounded vessel must make its situation known by displaying the prescribed signals and by warning traffic on the radiotelephone, and must inform the waterway authority so that navigation can be managed. Forcing the vessel off at full power without checking for damage risks flooding.

Question 19Navigation and seamanship (inland and coastal waters)

Which statement about the use of VHF radio for navigation on inland waterways is correct?

  1. Channel 16 is used for distress and calling, and working traffic is conducted on the designated inland waterway channels Correct answer.
  2. Channel 16 should be used for routine traffic to avoid switching channels
  3. VHF radio is optional and its use is not regulated on inland waterways
  4. Any channel may be used freely as long as the conversation is short

Explanation

Channel 16 is the international distress, safety and calling channel, and after contact is established traffic moves to a designated working channel. Inland waterway traffic uses specific channels laid down in the regional regulations.

Question 20Navigation and seamanship (inland and coastal waters)

What is the meaning of a 'sector light' shown at a lock or harbour entrance?

  1. A light that flashes only during fog
  2. A light that indicates the water temperature
  3. A light that changes colour according to the direction from which it is observed, defining safe approach sectors Correct answer.
  4. A light used only for fishing vessels

Explanation

A sector light shows different colours or characteristics depending on the bearing from which it is seen, so the navigator can keep the vessel within the safe approach sector. It is a position and alignment aid, not a weather or temperature indicator.

Question 21Navigation and seamanship (inland and coastal waters)

When planning a passage through a section of river with a forecast of strong wind against the current, what should the boatmaster expect?

  1. Steep, short waves and reduced control, requiring reduced speed and possibly shelter Correct answer.
  2. A calmer surface because wind and current cancel out
  3. No change because inland waters are always calm
  4. Improved steering because the wind pushes the bow

Explanation

When wind blows against the current, the waves become steep and short and the vessel's control and comfort deteriorate, so speed should be reduced and shelter sought if conditions worsen. Wind and current do not simply cancel each other.

Question 22Navigation and seamanship (inland and coastal waters)

Which of the following is the correct way to determine the safe under-keel clearance before entering a shallow section?

  1. Compare the vessel's actual draught with the charted depth corrected for the current water level and allow a safety margin Correct answer.
  2. Assume the charted depth is the minimum at all times
  3. Use the vessel's registered tonnage as a depth indicator
  4. Rely on the depth shown at the last port

Explanation

Safe clearance is the charted depth corrected for the actual water level minus the vessel's actual draught, with a margin for squat, waves and bottom irregularities. Registered tonnage and last-port depths say nothing about the section ahead.

Question 23Navigation and seamanship (inland and coastal waters)

What does a white light flashing in a group of four (four flashes then a pause) indicate on an inland waterway chart?

  1. An isolated danger mark
  2. A special mark for a pipeline
  3. A cardinal mark indicating the safest water is to the east Correct answer.
  4. A sector light for a lock

Explanation

Cardinal marks use white flashing lights in groups that correspond to the compass quadrant: three flashes for east, six for south, nine for west and continuous for north. A group of four is not a cardinal pattern, so the east indicator is the only correct quadrant reference among the options.

Question 24Navigation and seamanship (inland and coastal waters)

A vessel is crossing a fairway from a side channel. Which rule applies to the crossing vessel?

  1. The crossing vessel must stop and wait for a signal from the fairway vessel
  2. The crossing vessel must pass ahead of the fairway vessel at full speed
  3. The crossing vessel has priority over traffic in the fairway
  4. The crossing vessel must give way to vessels proceeding along the fairway Correct answer.

Explanation

A vessel leaving a side channel or crossing a fairway must give way to vessels already proceeding along the fairway. The crossing vessel must adjust course and speed early enough to pass astern of the fairway traffic.

Question 25Navigation and seamanship (inland and coastal waters)

What is the function of a 'km mark' or distance board along a regulated river?

  1. It marks the boundary of a fishing zone
  2. It shows the distance from a reference point so the vessel's position can be fixed Correct answer.
  3. It indicates the number of locks ahead
  4. It shows the maximum permitted draught

Explanation

Kilometre marks give the distance along the waterway from a defined reference point, allowing the boatmaster to fix position and report it accurately. They do not state draught limits, lock counts or fishing boundaries.

Question 26Navigation and seamanship (inland and coastal waters)

On an inland waterway, a power-driven vessel intending to turn around and proceed in the opposite direction must announce the manoeuvre. What does one long blast followed by one short blast indicate?

  1. I am reducing speed and stopping
  2. I am about to leave the fairway
  3. I am altering course to starboard
  4. I intend to turn around to starboard Correct answer.

Explanation

Under the inland waterway sound-signal scheme, a long blast followed by a short blast announces an intended turn to starboard, allowing other traffic to anticipate the swing of the vessel. The signal must be given before the manoeuvre begins so that following and oncoming vessels can keep clear.

Question 27Navigation and seamanship (inland and coastal waters)

You are steering a loaded barge train down a regulated river and see a white light showing a fixed red sector ahead. What is the correct interpretation?

  1. The sector marks a prohibited area that must be passed on the port side
  2. The sector warns of a hazard lying within the red arc Correct answer.
  3. The sector indicates a lock that is out of service
  4. The sector shows the safe channel for downstream traffic

Explanation

Sector lights divide their arc by colour so that a navigator can judge from which direction the light is seen. A red sector shows the side on which a hazard, obstruction or unsafe water lies, so the vessel must stay within the white or green sector. The colour seen, not the light itself, carries the warning.

Question 28Navigation and seamanship (inland and coastal waters)

What is the primary purpose of making fast to a mooring buoy or bollard before locking through a chamber with water level changes?

  1. To signal the lock keeper that the vessel is ready to depart
  2. To allow the engine to be shut down and the crew to leave the vessel
  3. To keep the vessel from drifting while the chamber is filled or emptied Correct answer.
  4. To increase the vessel's draft for stability during the fill

Explanation

In a lock chamber, the vessel must be held in position against the forces created by the rising or falling water and the turbulence of filling and emptying. Mooring lines to a buoy or bollard, tended as the level changes, prevent the vessel from drifting into the gates or neighbouring craft.

Question 29Navigation and seamanship (inland and coastal waters)

A vessel showing one black cone with its point downwards by day is encountered on a waterway. What does the shape indicate?

  1. The vessel is a fishing vessel with gear extending over the side Correct answer.
  2. The vessel is not under command
  3. The vessel is towing and the tow exceeds 200 m
  4. The vessel is aground

Explanation

A cone point downwards is the daytime signal of a vessel engaged in fishing with gear extending out over the side, warning others of the obstruction. It is not the shape used for a vessel aground or not under command, which use ball shapes. Being aware of the gear is essential when passing.

Question 30Navigation and seamanship (inland and coastal waters)

When preparing a passage plan for a river section with a forecast of a strong wind blowing against the current, what should the boatmaster expect?

  1. Steep short waves and reduced steerage in exposed reaches Correct answer.
  2. Faster current and therefore shorter passage time
  3. No effect on handling because inland vessels are sheltered
  4. Smoother water because the wind flattens the current

Explanation

When wind opposes the current, the surface becomes short and steep, which can cause heavy pitching, spray and loss of steerage way in exposed reaches. The boatmaster should plan slower speeds, allow extra time and consider sheltering or waiting if conditions worsen.

Question 31Navigation and seamanship (inland and coastal waters)

Which equipment must be within reach of the helm at all times for a vessel operating on inland waterways where a person may fall overboard?

  1. A fire hose and nozzle
  2. A lifebuoy with line ready for immediate throwing Correct answer.
  3. A spare anchor and chain
  4. A second VHF handset

Explanation

A lifebuoy with a line kept ready at the helm allows an immediate throw to a person in the water, which is the fastest means of rescue before the vessel can be manoeuvred. Delay in recovering a person from cold water is the main danger, so the appliance must be instantly available.

Question 32Navigation and seamanship (inland and coastal waters)

You are approaching a bend on a river where the fairway runs close to the outside bank. Why is it generally safer to keep to the inside of the bend when your vessel has room?

  1. The inside of the bend has priority over all other traffic by rule
  2. The outside of the bend is where the current is strongest and where oncoming traffic is most likely to be encountered Correct answer.
  3. The inside of the bend is always deeper and free of shoals
  4. The outside of the bend is reserved for vessels over 50 m in length

Explanation

On a bend, the current sweeps towards the outside bank, scouring the outside and depositing material on the inside; the outside is also where oncoming traffic tends to be found because the fairway follows the deeper water. Keeping to the inside where depth allows reduces the chance of meeting head-on traffic and of being set towards the bank.

Question 33Navigation and seamanship (inland and coastal waters)

What does a yellow buoy showing a yellow light flashing in groups of five indicate?

  1. The port side of the fairway
  2. The starboard side of the fairway
  3. The approach to a lock chamber
  4. A special area or a mark of a special nature Correct answer.

Explanation

Yellow buoys and yellow group-flashing lights mark special areas or special marks, such as spoil grounds, pipeline outfalls, swimming zones or administrative boundaries. They are not lateral marks and do not indicate which side of the fairway to pass.

Question 34Navigation and seamanship (inland and coastal waters)

A vessel is proceeding upstream and meets a downstream vessel at a narrow reach. Which action best complies with the general principle of inland navigation in such a situation?

  1. The downstream vessel must always stop and wait
  2. Both vessels must pass on the same side regardless of the channel
  3. The upstream vessel keeps to the side where the downstream vessel can pass most easily and reduces speed Correct answer.
  4. The vessel with the larger tonnage has the right of way

Explanation

In a narrow reach the vessel proceeding upstream is normally expected to give way and to keep to the side that allows the downstream vessel to pass safely, reducing speed as needed. The downstream vessel has less ability to stop because the current carries it, so the upstream vessel accommodates.

Question 35Navigation and seamanship (inland and coastal waters)

What is the correct action when you hear the distress signal of a vessel in the fairway and you are the nearest vessel able to assist?

  1. Continue on your passage and log the signal
  2. Anchor immediately and sound your own fog signal
  3. Proceed at best speed to the position and offer assistance, keeping a listening watch Correct answer.
  4. Wait for the harbour master to contact you before acting

Explanation

The nearest vessel in a position to assist is obliged to proceed with all speed to the scene and to render assistance, maintaining a listening watch on the distress channel. Failing to respond is a serious breach of the duty to assist, subject only to the safety of one's own vessel and crew.

Question 36Navigation and seamanship (inland and coastal waters)

What does a single white light flashing in a group of three (three flashes then a pause) indicate on an inland waterway chart or structure?

  1. A vessel is overtaking on the starboard side
  2. A ferry crossing the fairway is in operation Correct answer.
  3. A lock is ready for entry
  4. The fairway is closed to navigation

Explanation

A white light flashing in groups of three is the recognised signal marking a ferry crossing, warning approaching vessels that a ferry may be moving across the fairway. Vessels should reduce speed and keep a sharp lookout when passing such a crossing.

Question 37Navigation and seamanship (inland and coastal waters)

Which action best demonstrates good seamanship when mooring a vessel alongside a quay in a river with a noticeable current?

  1. Approach with the bow into the current, use short bursts of power and secure head and stern lines before spring lines Correct answer.
  2. Approach with engines stopped and rely on the current to bring the vessel alongside
  3. Approach with the stern into the current at full speed
  4. Approach across the current and let it set the vessel alongside

Explanation

Approaching with the bow into the current gives the boatmaster control and steerage, while short power bursts and prompt securing of head and stern lines prevent the vessel being set along the quay. Spring lines are then set to stop fore-and-aft movement.

Question 38Navigation and seamanship (inland and coastal waters)

What is the purpose of the draught marks painted at the bow and stern of an inland vessel?

  1. To allow the actual draught to be read so that under-keel clearance can be judged Correct answer.
  2. To indicate the maximum height of the mast
  3. To record the date of the last survey
  4. To show the vessel's registered tonnage

Explanation

Draught marks are graduated scales at bow and stern that let the crew read the actual immersion of the hull. Comparing the reading with the charted or known depth allows the boatmaster to judge the under-keel clearance before entering shallow water or a lock sill.

Question 39Navigation and seamanship (inland and coastal waters)

What is the correct way to use a hand lead line to confirm depth while the vessel is moving slowly in a channel?

  1. Heave the lead well ahead of the vessel and read the mark as the line becomes vertical Correct answer.
  2. Throw the lead to the side and read the mark as it touches bottom
  3. Trail the lead astern to measure the depth behind the vessel
  4. Lower the lead straight down and read the depth while the vessel is at full speed

Explanation

Heaving the lead ahead allows the line to become vertical under the vessel's position as it arrives, giving a true reading of the depth beneath the hull. Reading it while it is still trailing would overstate the depth. The sounding must be taken at the vessel's position, not behind it.

Question 40Navigation and seamanship (inland and coastal waters)

Which of the following best describes the effect of 'bank effect' when a vessel passes close to a river bank at speed?

  1. The vessel's rudder becomes more effective and steering improves
  2. The vessel's speed increases because the water is shallower near the bank
  3. The vessel is drawn towards the bank and its bow may swing towards the bank Correct answer.
  4. The vessel is pushed away from the bank by a cushion of water

Explanation

Water accelerates between the hull and the bank, lowering pressure there, so the vessel is drawn towards the bank and the bow tends to swing in. The effect grows with speed and with the closeness of the bank, so the boatmaster should reduce speed and keep well off.

Question 41COLREG / inland waterway traffic rules (CEVNI and national supplements)

Under CEVNI, which light must a power-driven vessel under way at night show in addition to its side lights and stern light when it is longer than 110 m?

  1. A second masthead light aft of and higher than the forward one Correct answer.
  2. A single all-round red light at the masthead
  3. Two all-round green lights on the foremast
  4. A flashing yellow light visible all round

Explanation

CEVNI requires vessels of 110 m or more in length to carry a second masthead light placed aft of and higher than the forward masthead light. This helps other traffic judge the vessel's length and heading at night.

Question 42COLREG / inland waterway traffic rules (CEVNI and national supplements)

In a narrow channel, a vessel proceeding downstream meets a vessel proceeding upstream. Under CEVNI, which vessel has the right of way?

  1. The vessel that is longer
  2. The vessel proceeding downstream Correct answer.
  3. The vessel proceeding upstream
  4. The vessel carrying dangerous goods

Explanation

CEVNI gives priority in narrow channels to the vessel proceeding downstream, because an upstream vessel can more easily hold position and wait. The upstream vessel must leave room and, where necessary, stop.

Question 43COLREG / inland waterway traffic rules (CEVNI and national supplements)

What does a single short blast from a vessel mean under CEVNI?

  1. I intend to overtake on your port side
  2. I am operating astern propulsion
  3. I am altering my course to port
  4. I am altering my course to starboard Correct answer.

Explanation

One short blast signals an intention to alter course to starboard. Two short blasts indicate a change to port, and three short blasts indicate astern propulsion.

Question 44COLREG / inland waterway traffic rules (CEVNI and national supplements)

Which vessel must, under CEVNI, give way when two power-driven vessels are crossing on courses that involve a risk of collision?

  1. The faster vessel
  2. The vessel that has the other on its starboard side Correct answer.
  3. The vessel that has the other on its port side
  4. The vessel nearer to the right bank

Explanation

The crossing rule requires the vessel that sees the other on its own starboard side to keep out of the way. It should normally pass astern of the other vessel.

Question 45COLREG / inland waterway traffic rules (CEVNI and national supplements)

A vessel displays two black balls in a vertical line by day. What does this indicate under CEVNI?

  1. The vessel is aground
  2. The vessel is a ferry crossing
  3. The vessel is not under command Correct answer.
  4. The vessel is engaged in dredging

Explanation

Two black balls in a vertical line mark a vessel not under command, which cannot manoeuvre as required. Other vessels must keep clear of it.

Question 46COLREG / inland waterway traffic rules (CEVNI and national supplements)

Under CEVNI, what is the maximum permissible blood alcohol content for a boatmaster on duty in most CEVNI member states unless national law is stricter?

  1. 0.5 g/l Correct answer.
  2. 1.5 g/l
  3. 0.8 g/l
  4. 1.0 g/l

Explanation

CEVNI sets a general limit of 0.5 g/l blood alcohol for persons serving as boatmaster. Individual states may impose stricter limits, including zero tolerance for professional crews.

Question 47COLREG / inland waterway traffic rules (CEVNI and national supplements)

Which document must a boatmaster of an inland vessel carrying passengers be able to produce during an inspection?

  1. A copy of the shipyard delivery note
  2. A certificate of hull thickness measurement
  3. A valid certificate of qualification for the vessel category Correct answer.
  4. The engine manufacturer's warranty

Explanation

The boatmaster must hold and produce a valid certificate of qualification appropriate to the vessel and the waters navigated. Other operational documents may be required but not the delivery note or warranty.

Question 48COLREG / inland waterway traffic rules (CEVNI and national supplements)

What is the meaning of a blue board with a white flashing light at a lock under CEVNI?

  1. The lock is out of service
  2. Entry into the lock is permitted Correct answer.
  3. Only passenger vessels may enter
  4. Wait outside the lock for further instructions

Explanation

A blue board with a white flashing light indicates that entry into the lock is permitted. A red light or red board would signal that entry is prohibited.

Question 49COLREG / inland waterway traffic rules (CEVNI and national supplements)

A vessel is approaching a bend in a narrow channel where visibility is obstructed. Under CEVNI, what sound signal should it give?

  1. One prolonged blast Correct answer.
  2. Three short blasts
  3. Two short blasts
  4. Five short blasts

Explanation

A prolonged blast is sounded when approaching a bend or an area where other vessels may be hidden. Any vessel hearing it from around the bend should respond with a prolonged blast.

Question 50COLREG / inland waterway traffic rules (CEVNI and national supplements)

A power-driven vessel wishes to overtake another in a narrow channel. Which signal combination expresses the intention to overtake on the other vessel's starboard side?

  1. Two prolonged blasts followed by two short blasts
  2. Three prolonged blasts
  3. One prolonged blast followed by three short blasts
  4. Two prolonged blasts followed by one short blast Correct answer.

Explanation

The overtaking signal consists of two prolonged blasts followed by short blasts indicating the side to be used: one short for starboard, two short for port. The vessel to be overtaken must confirm or refuse.