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What is a growler?. A small iceberg. An instrument for measuring sound distance in fog. An unexpected large wave. A Canadian term for a hurricane.

A tug is connected by a line at your bow. Will the bollard pull be the same at any speed? Choose the most complete answer. No, best use of a tug is made when the ship is going astern. No, when the speed is increasing, the bollard pull is also increasing. Yes, the bollard pull is the same at any speed. No, when the speed exceeds 5 knots the tug will not be of much help.

In the Northern Hemisphere, which is the most dangerous part of a storm in relation to the direction in which it is moving?. Its left hand side. Its tail. Its right hand side. Its eye.

Most large tankers are moored using wire ropes on winches in order to remain safely moored alongside. If extra mooring lines are required, would a mixture of wires and full-length synthetic fibre ropes be appropriate?. Yes, because the extra fibre ropes are easier to handle. No, because most fibre ropes of the required breaking strain are large and difficult to handle. No, because the wires would take most of the strain and the fibre ropes practically. Yes, because the fibre ropes are more flexible and complement the wires, adding to the overall effectiveness of the mooring.

What shape of a hull would you say a course unstable ship would have?. A length to beam ratio less than 7. A length to beam ratio greater than 5.5. A long, slim hull. A length to beam ratio less than 5.5.

In which direction does the Coriolis force deflect winds in the Southern Hemisphere?. Anticlockwise. To the right. Clockwise. To the left.

What do tightly spaced isobars indicate?. No wind at all. Strong winds. Occasional gusts of wind. Light winds.

Which of these is not a meteorological classification of an air mass?. Equatorial maritime. Tropical continental. Polar continental. Tropical maritime.

The rudder is in the hard over position, propeller stopped. The ship is turning slowly. What can be done to make her turn faster without increasing forward speed?. Give slow ahead. Give a kick ahead. Give full astern until the ship has stopped, then full ahead again with the rudder hard over. Give half astern.

You observe a strong breeze of 25 knots accompanied by large waves with white foam crests and some spray. What Force on the Beaufort scale would this be rated at?. 4. 5. 6. 2.

You are on a VLCC and are approaching shallow water with an underkeel clearance of 15%. What speed should you have when entering the shallow water and when should you slow down?. About 6-7 knots, slow down 30 minutes before entering. About 10 knots, slow down 15 minutes before entering. Maintain normal sea-speed, no need to slow down. Reduce to slow or less in due time before entering.

In the Northern Hemisphere, which direction will the wind normally be from just before a cold front arrives?. SE. NE. SW. NW.

The breaking of long waves can be triggered by their meeting the Continental Shelf. How deep is the Continental Shelf?. 400 metres. 200 metres. 250 metres. 100 metres.

The graph shows the decrease of speed, against time, on a 100,000 deadweight tanker proceeding at full speed of 13.3 knots and at minute 0 the engine was stopped. What is the decrease in speed most likely to be?. None of the other options. Series 1. Series 3. Series 2.

The rudder is hard over, engine full ahead in shallow water. How much rudder lift force remains when the engine is stopped?. About 50%. About 80%. About 5%. About 10%.

In which direction do jet streams normally travel?. North to south. West to east. East to west. South to north.

In certain latitudes icebergs present a considerable hazard to shipping. What proportion of their volume is normally visible?. 0.1. 0.15. 0.05. 0.2.

You have made a turning test at full speed in deep water. You are now going to make one with initial speed, slow ahead. Do you think the diameter will differ from that of initial full ahead?. Yes, there will be a large difference in the turning diameter between full and slow. Yes, it will be much smaller with slow ahead. Yes, it will be much greater with slow ahead. The diameter will be the same whatever initial speed we have when starting the turn.

What is 'ice blink'?. A glare on the horizon perhaps indicating ice ahead. Small lumps of ice moving together. Temporary damage to the eyes caused by looking for too long at ice. The icing up of a vessel's superstructure.

A ship is being turned short round in a tidal stream that is running at three knots. If in still waters this normally takes 12 minutes, what allowance, if any, should be made for the drift of the ship during the turn?. 6 cables. 12 cables. no allowance. 3 cables.

What is the most important way of using air pressure measurements to predict bad weather is coming?. Noticing the air pressure level hasn't changed by more than 1 mb in 24 hours. Noticing a steady rise in air pressure. Noticing a steady, rapid fall in air pressure. Noticing when the pressure reading hits 1000 mb.

The frequency of slamming can be more than halved by reducing the ship speed by: 20 - 25 %. 15 - 20 %. 25 - 30 %. 10 - 15 %.

The rudder is hard over, engine full ahead in deep water. How much rudder lift force remains when the engine is stopped?. About 50%. About 20%. About 80%. About 5%.

You are sailing in shallow water, with 15 % underkeel clearance. How will your stopping distance and turning circle change compared with deep water?. Stopping distance shorter & turning circle smaller. Stopping distance & turning circle will remain the same. Stopping distance same & turning circle larger. Stopping distance longer & turning circle larger.

If vessels cut their speed by 50% how much does this reduce any damage caused by collision?. 0.25. 0.85. 0.75. 0.5.

At what temperatures can ice start to form on a vessel's superstructure?. 2° C. --2° C. --4° C. 0° C.

When a conventional rudder is put hard over it creates a lift force and a drag force. When the ship has to turn, how much lift force remains if the rudder-angle is decreased to 20 degrees from the hard over position?. About 50%. About 10%. About 80%. About 30%.

Overshoot is an expression used when talking about a ship's steering ability. How can overshoot be determined?. Do a 540 degrees turning circle. Do a 20/20 degree zigzag manoeuvre. Do a 360 degrees turning circle. Do a standing turn.

What distance must visibility be reduced to before water vapour is classed as fog?. 1000 m. 2 km. 500 m. 1500 m.

Your vessel is to turn to port in a narrow canal using one tug (turning the bow to port). In which position and how will you use the tug ? (Your vessel's engine will also be used.). Make the tug fast in centre bow fairlead and pull. Make the tug fast on the port shoulder and pull. Make the tug fast on the starboard shoulder and push. Make the tug fast aft and pull.

What level of visibility does 'poor' indicate in a weather forecast?. Between 1000 - 2000 m. Less than 1000 m. Between 2 - 5 nautical miles. Between 5 - 8 nautical miles.

What is an isobar?. A contour line of constant air pressure. A contour line of constant visibility. A contour line of constant wind speed. A contour line of constant altitude.

What is the biggest cause of high waves forming?. Depth of sea. Distance from nearest land. Wind. Latitude.

You are in a 360 degrees turn with engine full ahead. If you reduce speed while in the turn, how will the turning diameter change?. The turning diameter will not change. The turning diameter will increase. The turning diameter will become smaller. The change will depend on rudder angle.

What wind speeds are likely when a weather forecast predicts an imminent Force 8 gale?. Over 24 knots. Over 14 knots. Over 34 knots. Over 10 knots.

What is the minimum sea water temperature necessary for a hurricane to develop?. 26°. 7°. 17°. 37°.

At what altitude do altostratus clouds generally form?. above 11000 m. 2000 - 5500 m. 500 - 2000 m. 4500 - 11000 m.

You are sailing in shallow water, with 15 % underkeel clearance. Coming full astern from full ahead , how will your course change compared with deep water?. The heading will change only slightly. Large change at first then changing slightly. The heading will most likely change by a large amount. The heading will not change.

Arctic air is usually: temperate and wet. cold and wet. cold and dry. freezing and sharp.

What shape of hull does a course stable ship usually have?. A short, slim hull. A long, slim hull. A long, wide hull. A short, wide hull.

A depression is formed when: warm, damp air meets cold, dry air. two masses of tropical continental air meet. polar continental air meets polar sea air. any two air masses meet.

In a weather forecast what wave height is indicated by the term 'moderate sea'?. 0.5 - 1.25 m. 4 - 6 m. 2.5 - 4 m. 1.25 - 2.5 m.

When manoeuvring, when will you notice the effect of shallow water?. When your underkeel clearance is 50% or less. When your underkeel clearance is 75% or less. When your underkeel clearance is 15% or less. When your underkeel clearance is 10% or less.

At roughly what latitude does the warm air, that has risen from above the equator, start to descend forming a belt of high-pressure circulation?. 25°. 15°. 45°. 30°.

The diagram shows the manoeuvring characteristics of a ship. What are the distances A1 and A2 called?. Transfer. Turning Distance. Tactical Diameter. Advance.

What is normally the air pressure at sea level?. 1310 mb. 1013 mb. 103 mb. 13 mb.

If you are facing into the wind in the Southern Hemisphere, where would an area of low-pressure lie?. To your left. Behind you. To your right. In front of you.

During which month do most tropical storms form in the Northern Hemisphere?. December. May. August. September.

What does 'soon' mean in a weather forecast?. Within 16 - 24 hours of the warning being given. Within 6 hours of the warning being given. Within 6 -12 hours of the warning being given. Within 12 - 16 hours of the warning being given.

You are berthed with a steady offshore beam wind of 30 knots. This wind suddenly increases to 60 knots. When this happens, the force pushing the vessel off the berth will be. quintupled. tripled. doubled. quadrupled.

On a synoptic weather chart, what level of air pressure would be represented by the figure 113?. 1130.0 mb. 11.30 mb. 113.0 mb. 1011.3 mb.

Buys Ballot's Law says that if a seafarer faces the wind in the Southern Hemisphere then the area of low pressure will be: Directly ahead. Directly behind. To the left. To the right.

What does it mean when the barometer shows air pressure to be falling rapidly?. Bad weather is on the way. Snow may be about to fall. Rising seas imminent. Good weather is on the way.

Tropical maritime air is usually: cold, dry and stable. warm, dry and stable. warm, moist and unstable. cold, wet and stable.

The passage of a cold front is often marked by Stratus or Stratocumulus cloud giving way. Cumulus. Nimbostratus. Cirrus. Altostratus.

After allowing for latitude daytime variation, what sort of fall in air pressure might indicate an approaching storm?. 1 mb in one hour. 3 mb in three hours. 3 mb in 24 hours. 1 mb in three hours.