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DIAGRAMS TO ILLUSTRATE THE USE OF THE

LIGHTS CARRIED BY VESSELS AT SEA, And the manner in which they indicate to the vessels which sees them, the

position and description of the vessel that carries them.

WHEN BOTH GREEN AND RED LIGHTS ARE SEEN.

A sees a Red and Green Light ahead :- A knows that a vessel is approaching her on a course directly opposite to her own, as B. (Fig. 1.)

If A sees a White Mast-head Light above the other two, she knows that B is a steam vessel.

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WHEN THE RED AND NOT THE GREEN LIGHT IS SEEN.

A sees a Red Light ahead or on the bow ;-A knows that either (Fig. 2) a vessel is approaching her on her Port bow, as B; or (Fig. 3) a vessel is crossing in some direction to Port, as DDD.

If A sees a White Mast-head Light above the Red Light, A knows that the vessel is a steam vessel, and is either approaching her in the same direction, as B, or is crossing to Port in some direction, as DDD.

WHEN THE GREEN AND NOT THE RED LIGHT IS SEEN.

A sees a Green Light ahead or on the bow ;-A knows that either (Fig. 4) a vessel is approaching her on her Starboard bow, as B, or (Fig. 5) a vessel is crossing in some direction to Starboard, as DDD.

If A sees a White Mast-head Light above the Green Light, A knows that the vessel is a steam vessel, and is either approaching her in the same direction, as B, or is crossing to starboard in some direction, as DDD.

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HEADS OF EXAMINATION In Regulations respecting Lights and Fog Signals and in the Steering and

Sailing Rules.

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1. What light or lights are required by the regulations to be exhibited by sailing vessels at anchor in a roadstead or fairway? A.-One light only, viz., a white light.

What light or lights are required by the regulations to be exhibited by steam ships in a roadstead or fairway at anchor.

A.—The same as for sailing vessels.
3:—Where is the anchor light to be exhibited ?

A.--Where it can best be seen. It must of course be placed where there is the least possible chance of obstruction from spars, ropes, &c., &c.

4. To what height may the anchor light be hoisted ?

A.-It may be exhibited at a height of 20 feet above the deck, but not higher.

5:- What is the description of the lantern containing the anchor light required by the regulations ?

A.-Globular.
6.-In what direction or directions must the anchor light show?

A.-It must show a clear, uniform, and unbroken light, visible all round the horizon.

7.--At what distance must it be visible ? A.- At least one mile.

8.—What is the number of lights required by the regulations to be carried by sailing ships when under weigh at night?

A.-Two.

9.–Of what colour are these lights, and how are they to be placed on on board the ship?

A.—A green light on the starboard side, and a red light on the port side.

10.—What description of light must be shown from the sides of sailing vessels under weigh; and over how many points of the compass, , and in what directions, and how far, are they required to show?

A.—Each light must be so constructed as to show an uniform and unbroken light over an arc of the horizon of 10 points of the compass ; so fixed as to throw the light from right ahead to two points abaft the beam on the starboard and port sides respectively; and of such a character as to be visible on a dark night, with a clear atmosphere, at a distance of at least two miles.

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11.--What lights are they to carry when being towed at night? A.-The same.

12.-Are the side lights required to be fitted with screens; and if so, on what side, and of what length, and how ?

A.-Yes, on the inboard side; at least three feet in length, measuring forward from the light. They are to be so fitted as to prevent the coloured lights from being seen across the bows.

13.- What is the number of lights required by the regulations to be carried by steam ships when under steam at night?

A.—Three lights.

14.–Of what colour are these lights, and how are they to be placed on board the ship?

A.—White at the fore-mast head, green on the starboard side, and red on the port side.

15.-Over how many points of the compass, in what direction, and how far, is the fore mast-head light of a steamer required to show?

A.-Over 20 points, viz., from right ahead to two points abaft the beam on both sides. It must be of such a character as to be visible on a dark night, with a clear atmosphere, at a distance of at least five miles.

16. ---Are they required to be fitted with screens; and if so, on which side, and of what length ?

A.—The green and red lights are to be fitted with screens on the inboard side, extending at least three feet forward from the light, as in the case of sailing vessels.

17.-Over how many points of the compass, in what directions, and how far, are the coloured side lights of steamers required to show?

A.-Each light must be so constructed as to show an uniform and unbroken light over an arc of the horizon of 10 points of the compass, so fixed as to throw the light from right ahead to two points abaft the beam on the starboard and port sides respectively, and of such a character as to be visible on a dark night with a clear atmosphere at a distance of at least two miles.

18.—What description of lights are steamers required by the regulations to carry when they are not under steam, but under sail only?

A. ---Side lights only, the same as sailing vessels.

19.-What exceptional lights are to be carried by small sailing vessels in certain cases ?

A.-Whenever, as in the case of small vessels during bad weather, the green and red lights cannot be fixed, these lights shall be kept on dock, on their respective sides of the vessel, ready for instant exhibition,

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