RULE 25 - SAILING VESSELS UNDERWAY AND VESSELS UNDER OARS

(a)     A sailing vessel underway shall exhibit:

1. sidelights Rule 21. (b)"Sidelights" means a green light on the starboard side and a red light on the port side each showing an unbroken light over an arc of the horizon of 112.5 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on its respective side. In a vessel of less than 20 meters in length the sidelights may be combined in one lantern carried on the fore and aft centerline of the vessel, except that on a vessel of less than 12 meters in length the sidelights when combined in one lantern shall be placed as nearly as practicable to the fore and aft centerline of the vessel. [Inld];
2. a sternlight Rule 21. (c)"Sternlight" means a white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel..

(b)     In a sailing vessel Rule 3. (3) The term "sailing vessel" means any vessel under sail provided that propelling machinery, if fitted, is not being used. of less than 20 meters in length Rule 3. (j/i)The words "length" and "breadth" of a vessel mean her length overall and greatest breadth. the lights prescribed in paragraph (a) of this Rule may be combined in one lantern carried at or near the top of the mast where it can best be seen.

(c)     A sailing vessel underway Rule 3. (h/i)The word "underway" means that a vessel is not at anchor, or made fast to the shore, or aground. may, in addition to the lights prescribed in paragraph (a) of this Rule, exhibit at or near the top of the mast, where they can best be seen, two all-round lights in a vertical line, the upper being red and the lower Green, but these lights shall not be exhibited in conjunction with the combined lantern permitted by paragraph (b) of this Rule.

(d)      

1. A sailing vessel of less than 7 meters in length shall, if practicable, exhibit the lights prescribed in paragraph (a) or (b) of this Rule, but if she does not, she shall have ready at hand an electric torch or lighted lantern showing a white light which shall be exhibited in sufficient time to prevent collision.
2. A vessel under oars may exhibit the lights prescribed in this rule for sailing vessels, but if she does not, she shall have ready at hand an electric torch or lighted lantern showing a white light which shall be exhibited in sufficient time to prevent collision.

(e)     A vessel proceeding under sail when also being propelled by machinery shall exhibit forward where it can best be seen a conical shape, apex downwards.  A vessel of less than 12 meters in length is not required to exhibit this shape, but may do so. [Inld]