RoR TEST 1

Question 1

Application

Rule 1 (e)

Answer 1

Whenever the Government concerned shall have determined that a vessel of special construction or purpose cannot comply fully with the provisions of any of these Rules with respect to the number, position, range or arc of visibility of lights or shapes, as well as to the disposition and characteristics of sound-signalling appliances, such vessel shall comply with such other provisions in regard to the number, position, range or arc of visibility of lights or shapes, as well as to the disposition and characteristics of sound-signalling appliances, as her Government shall have determined to be the closest possible compliance with these Rules in respect of that vessel.

Question 2

General definitions

Rule 3 (c)

Answer 2

The term “sailing vessel” means any vessel under sail provided that propelling machinery, if fitted, is not being used.

Question 3

General definitions

Rule 3 (e)

Answer 3

The word “seaplane” includes any aircraft designed to manoeuvre on the water.

Question 4

General definitions

Rule 3 (l)

Answer 4

The term “restricted visibility” means any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar causes.

Question 5

Rule 5

Look-out

Answer 5

Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision.

Question 6

Rule 6

Safe speed

Answer 6

Every vessel shall at all times proceed at a safe speed so that she can take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances and conditions.

Question 7

Safe speed

Rule 6 (a) (i-vi)

Answer 7

By all vessels:
(i). the state of visibility;

(ii) . the traffic density including concentrations of fishing vessels or any other vessels;
(iii) . the manoeuvrability of the vessel with special reference to stopping distance and turning ability in the prevailing conditions;
(iv) . at night the presence of background light such as from shore lights or from back scatter of her own lights;
(v) . the state of wind, sea and current, and the proximity of navigational hazards;
(vi) . the draught in relation to the available depth of water.

Question 8

Safe speed

Rule 6 (b) (i-vi)

Answer 8

Additionally, by vessels with operational radar:

(i) . the characteristics, efficiency and limitations of the radar equipment;
(ii) . any constraints imposed by the radar range scale in use;
(iii) . the effect on radar detection of the sea state, weather and other sources of interference;
(iv) . the possibility that small vessels, ice and other floating objects may not be detected by radar at an adequate range;
(v) . the number, location and movement of vessels detected by radar;
(vi) . the more exact assessment of the visibility that may be possible when radar is used to determine the range of vessels or other objects in the vicinity.

Question 9

Risk of collision

Rule 7 (b)

Answer 9

Proper use shall be made of radar equipment if fitted and operational, including long-range scanning to obtain early warning of risk of collision and radar plotting or equivalent systematic observation of detected objects.

Question 10

Risk of collision

Rule 7 (c)

Answer 10

Assumptions shall not be made on the basis of scanty information, especially scanty radar information.

Question 11

Risk of collision

Rule 7 (d) (i-ii)

Answer 11

In determining if risk of collision exists the following considerations shall be among those taken into account:

(i) . such risk shall be deemed to exist if the compass bearing of an approaching vessel does not appreciably change;
(ii) . such risk may sometimes exist even when an appreciable bearing change is evident, particularly when approaching a very large vessel or a tow or when approaching a vessel at close range.

Question 12

Action to avoid collision

Rule 8 (c)

Answer 12

If there is sufficient sea-room, alteration of course alone may be the most effective action to avoid a close-quarters situation provided that it is made in good time, is substantial and does not result in another close-quarters situation.

Question 13

Action to avoid collision

Rule 8 (e)

Answer 13

If necessary to avoid collision or allow more time to assess the situation, a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion.

Question 14

Action to avoid collision

Rule 8 (f) (i-iii)

Answer 14

(i) . A vessel which, by any of these Rules, is required not to impede the passage or safe passage of another vessel shall, when required by the circumstances of the case, take early action to allow sufficient sea-room for the safe passage of the other vessel.
(ii) . A vessel required not to impede the passage or safe passage of another vessel is not relieved of this obligation if approaching the other vessel so as to involve risk of collision and shall, when taking action, have full regard to the action which may be required by the Rules of this part.
(iii) . A vessel the passage of which is not to be impeded remains fully obliged to comply with the Rules of this part when the two vessels are approaching one another so as to involve risk of collision.

Question 15

Traffic separation schemes

Rule 10 (a)

Answer 15

This Rule applies to traffic separation schemes adopted by the Organization and does not relieve any vessel of her obligation under any other rule.

Question 16

Traffic separation schemes

Rule 10 (c)

Answer 16

A vessel shall, so far as practicable, avoid crossing traffic lanes but if obliged to do so shall cross on a heading as nearly as practicable at right angles to the general direction of traffic flow.

Question 17

Traffic separation schemes

Rule 10 (d) (i-ii)

Answer 17

(d) .
(i) . A vessel shall not use an inshore traffic zone when she can safely use the appropriate traffic lane within the adjacent traffic separation scheme. However, vessels of less than 20 metres in length, sailing vessels and vessels engaged in fishing may use the inshore traffic zone.
(ii) . Notwithstanding subparagraph (d)(i), a vessel may use an inshore traffic zone when en route to or from a port, offshore installation or structure, pilot station or any other place situated within the inshore traffic zone, or to avoid immediate danger.

Question 18

Traffic separation schemes

Rule 10 (k)

Answer 18

A vessel restricted in her ability to manoeuvre when engaged in an operation for the maintenance of safety of navigation in a traffic separation scheme is exempted from complying with this Rule to the extent necessary to carry out the operation.

Question 19

Traffic separation schemes

Rule 10 (l)

Answer 19

A vessel restricted in her ability to manoeuvre when engaged in an operation for the laying, servicing or picking up of a submarine cable, within a traffic separation scheme, is exempted from complying with this Rule to the extent necessary to carry out the operation.

Question 20

Sailing vessels

Rule 12 (b)

Answer 20

For the purpose of this Rule the windward side shall be deemed to be the side opposite to that on which the mainsail is carried or, in the case of a square-rigged vessel, the side opposite to that on which the largest fore-and-aft sail is carried.

Question 21

Responsibilities between vessels

Rule 18 (b) (i-iii)

Answer 21

A sailing vessel underway shall keep out of the way of:

(i) . a vessel not under command;
(ii) . a vessel restricted in her ability to manoeuvre;
(iii) . a vessel engaged in fishing.

Question 22

Responsibilities between vessels

Rule 18 (e)

Answer 22

A seaplane on the water shall, in general, keep well clear of all vessels and avoid impeding their navigation. In circumstances, however, where risk of collision exists, she shall comply with the Rules of this part.

Question 23

Conduct of vessels in restricted visibility

Rule 19 (e)

Answer 23

Except where it has been determined that a risk of collision does not exist, every vessel which hears apparently forward of her beam the fog signal of another vessel, or which cannot avoid a close-quarters situation with another vessel forward of her beam, shall reduce her speed to the minimum at which she can be kept on her course. She shall if necessary take all her way off and in any event navigate with extreme caution until danger of collision is over.