If there is any doubt such risk shall be deemed to exist. The effectiveness of the action shall be carefully checked until the other vessel is finally past and clear. The latter vessel may use the sound signal prescribed in Rule 34 d if in doubt as to the intention of the crossing vessel. The vessel to be overtaken shall, if in agreement, sound the appropriate signal prescribed in Rule 34 c ii and take steps to permit safe passing.
If in doubt she may sound the signals prescribed in Rule 34 d. However, vessels of less than 20 metres in length, sailing vessels and vessels engaged in fishing may use the inshore traffic zone. When two power-driven vessels are crossing so as to involve risk of collision, the vessel which has the other on her own starboard side shall keep out of the way and shall, if the circumstances of the case admit, avoid crossing ahead of the other vessel.
Every vessel which is directed to keep out of the way of another vessel shall, so far as possible, take early and substantial action to keep well clear. In circumstances, however, where risk of collision exists, she shall comply with the Rules of this Part. A power-driven vessel shall have her engines ready for immediate manoeuvre. If so, she shall take avoiding action in ample time, provided that when such action consists of an alteration of course, so far as possible the following shall be avoided:.
She shall if necessary take all her way off and in any event navigate with extreme caution until danger of collision is over. In a vessel of less than 20 metres in length the sidelights may be combined in one lantern carried on the fore and aft centreline of the vessel. The lights prescribed in these Rules shall have an intensity as specified in Section 8 of Annex I to these Regulations so as to be visible at the following minimum ranges:.
When the length of the tow, measuring from the stern of the towing vessel to the after end of the tow exceeds metres, three such lights in a vertical line;.
All possible measures shall be taken to indicate the nature of the relationship between the towing vessel and the vessel being towed as authorized by Rule 36, in particular by illuminating the towline. Vessels not under command or restricted in their ability to manoeuvre. The highest and lowest of these lights shall be red and the middle light shall be white;. The highest and lowest of these shapes shall be balls and the middle one a diamond;. Measures shall be taken to ensure its all-round visibility.
One of these lights or shapes shall be exhibited near the foremast head and one at each end of the fore yard. These lights or shapes indicate that it is dangerous for another vessel to approach within metres of the mine clearance vessel. Such signals are contained in Annex IV to these Regulations. A vessel constrained by her draught may, in addition to the lights prescribed for power-driven vessels in Rule 23, exhibit where they can best be seen three all-round red lights in a vertical line, or a cylinder.
Where it is impracticable for a seaplane or a WIG craft to exhibit lights and shapes of the characteristics or in the positions prescribed in the Rules of this Part she shall exhibit lights and shapes as closely similar in characteristics and position as is possible.
The bell or gong or both may be replaced by other equipment having the same respective sound characteristics, provided that manual sounding of the prescribed signals shall always be possible.
Such signal may be supplemented by a light signal of at least five short and rapid flashes. Such signal shall be answered with a prolonged blast by any approaching vessel that may be within hearing around the bend or behind the intervening obstruction. In or near an area of restricted visibility, whether by day or night, the signals prescribed in this Rule shall be used as follows:. When practicable, this signal shall be made immediately after the signal made by the towing vessel.
In a vessel of metres or more in length the bell shall be sounded in the forepart of the vessel and immediately after the ringing of the bell the gong shall be sounded rapidly for about 5 seconds in the after part of the vessel.
A vessel at anchor may in addition sound three blasts in succession, namely one short, one prolonged and one short blast, to give warning of her position and of the possibility of collision to an approaching vessel.
A vessel aground may in addition sound an appropriate whistle signal. However, if she does not, she shall make some other efficient sound signal at intervals of not more than 2 minutes.
If necessary to attract the attention of another vessel any vessel may make light or sound signals that cannot be mistaken for any signal authorised elsewhere in these Rules, or may direct the beam of her searchlight in the direction of the danger, in such a way as not to embarrass any vessel. Any light to attract the attention of another vessel shall be such that it cannot be mistaken for any aid to navigation.
For the purpose of this Rule the use of high intensity intermittent or revolving lights, such as strobe lights, shall be avoided. When a vessel is in distress and requires assistance she shall use or exhibit the signals described in Annex IV to these Regulations. Any vessel or class of vessels provided that she complies with the requirements of the International Regulations for Preventing Collisions at Sea, a , the keel of which is laid or which is at a corresponding stage of construction before the entry into force of these Regulations may be exempted from compliance therewith as follows:.
This height shall be measured from the position vertically beneath the location of the light. When however a masthead light is carried in addition to sidelights and a sternlight or the all-round light prescribed in Rule 23 c i is carried in addition to sidelights, then such masthead light or all-round light shall be carried at least 1 metre higher than the sidelights.
They shall not be so low as to be interfered with by deck lights. On a vessel of 50 metres or more in length this forward anchor light shall be placed at a height of not less than 6 metres above the hull. The forward light shall be placed not more than one-quarter of the length of the vessel from the stem. They shall be placed at or near the side of the vessel. Details of location of direction-indicating lights for fishing vessels, dredgers and vessels engaged in underwater operations.
This light shall be placed not higher than the all-round white light prescribed in Rule 26 c i and not lower than the sidelights. In no case shall the upper of these lights or shapes be at a greater height than the lower of the three lights or shapes prescribed in Rule 27 b i and ii.
The sidelights of vessels of 20 metres or more in length shall be fitted with inboard screens painted matt black, and meeting the requirements of Section 9 of this Annex.
On vessels of less than 20 metres in length the sidelights, if necessary to meet the requirements of Section 9 of this Annex, shall be fitted with inboard matt black screens.
With a combined lantern, using a single vertical filament and a very narrow division between the green and red sections, external screens need not be fitted. Sign up Log in. Web icon An illustration of a computer application window Wayback Machine Texts icon An illustration of an open book.
Books Video icon An illustration of two cells of a film strip. Video Audio icon An illustration of an audio speaker. Interactive navigation light identification software is also available on a companion website to offer further testing before examination. All questions are asked randomly, and will help prepare you for the oral exam. Visit the website at www. Author : Lou Frey, Jr. Political Rules of the Road is a collection of informal rules, advice, and anecdotes shared by former and current members of congress, presidents, governors, and cabinet members.
Collisions are expensive! Leisure boaters, as much as professional mariners, need to know the rules, and a firm understanding is required to pass many nautical exams. Paul knows the COLREGs backwards having used them extensively in his career with the Royal Navy — from the bridges of submarines and warships which he has commanded, with each giving a rather different perspective on other shipping!
He also knows the other side well with his extensive cruising experience, from his early years with his father to now, sailing his own yacht. He brings the vital, but dry, document to life, going through it not in order, but by topics which are relevant to the mariner and sailor.
Paul explains the intention of each rule and how it should be applied when at sea. Get Started. Learning to drive Driving test questions Road signs Mock theory test. What To Do Now? If you have a questions regarding your driving lessons, choice of instructor in your area or need help in choosing the right driving school make sure to contact our dedicated driving education support team. Highly recommend Ladybird Driving School.
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