Ship Manoeuvring, Handling. Test 10 – Online Maritime Tests

Two lines sent out and pretensioned equally have the same length, same breaking strength and same directional load. However, one is made of wire (which has a full load elastic elongation of about 1,5 % of its length) and the other made of nylon (which has a full load elongation of about 30 % of its length). If a sudden gust of wind increase the load on the lines, this increased load will be shared as follows:

Wire takes 55 % of the extra load. Rope takes 45 % of the extra load.
Wire takes 95 % of the extra load. Rope takes 5 % of the extra load.
Wire takes 45 % of the extra load. Rope takes 55 % of the extra load.
By the wire and rope equally.

When fastening synthetic fibre ropes such as polypropylene on bitts, for safety and better rope control it is recommended to:

Make it fast in a figure of eight fashion, fig. 3.
Make it fast with round turns on the leading bitt alone, fig. 1.
Make it fast on the second bitt alone, fig. 2.
Make two round turns fast on the leading bitt and then figure of eight on both bitts, fig. 4.

Once a ship (equipped with self-stowing autotension winches) is moored alongside a loading or discharging berth, it is recommended that:

The 'spring' winches be left in the auto tension mode and all other winches with the manual brake on.
All winches be left with the manual brake on and gear out.
The 'breastline' and 'headline' winches be left in the auto tension mode and spring winches with manual brake on.
All mooring winches be left in 'auto tension' mode.

You are meeting with another ship in confined waters. What can happen as the ships approach each other?

The bows of the ships will be pushed away from each other
The bows of the ships will be sucked together
This does not apply to your vessel
There will be none of the mentioned effects

When synthetic ropetails are used at the ends of wire ropes, due expected faster deterioration of the synthetic ropetails, it is recommended that when ordering ropetails, their initial breaking strength specified should be:

65 % more than the wire's.
25 % more than the wire's.
15 % more than the wire's.
15 % more than the wire's.

Your vessel is berthed at a seaberth with an underkeel clearance of 5 times the draft and a cross or beam current of 1 knot is acting on you with force of, let us say, 50 tons. You move to another shallower berth with your draft exactly the same as before and with exactly the same beam current of 1 knot acting on you. However your underkeel clearance here is only 0.5 times the draft. If the current was exerting a force of 50 tons on you before, how much force will it exert now?

25 tons.
Remain at 50 tons.
150 tons.
75 tons.

Two synthetic fibre lines of the same size and material are run out and pretensioned at the berth. However one line (line A) is secured to a shore bollard twice as far as the other line (line B). If a sudden increase in wind now causes an extra load to come on the lines, the extra load will be shared by the lines as follows:

A will take 1/2 of the extra load. B will take 1/2 of the extra load
A will take 3/4 of the extra load. B will take 1/4 of the extra load.
A will take 1/3 of the extra load. B will take 2/3 of the extra load.
A will take 1/4 of the extra load. B will take the 3/4 of the extra load.

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:

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.
Damage to the winch by distorting the shaft.
Strain on the fairleads and rollers in use in excess of their Safe Working Load.
All the listed alternatives.

If you are called upon to reeve a new wire onto a selfstowing winch drum you would, after looking at brake arrangement, reeve it to pay out as follows:

Direction B.
Depends on the lay of the wire strands.
Direction A.
Doesn't matter which direction.

You are on ship A. What would you do before meeting ship B?

Put the engine to full astern
Increase speed to full ahead, 13 knots
Stop the engine before meeting, and apply engine during meeting
Increase the speed to 8 knots

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