Article 3.12 - Marking for sailing vessels under way

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1. Sailing vessels shall carry:

By night:

(a) The side lights prescribed in article 3.08, paragraph 1 (b); however these lights may be ordinary, instead of bright;

(b) The stern light prescribed in article 3.08, paragraph 1 (c).

2. In addition to the lights prescribed in paragraph 1 of this article, a sailing vessel may carry:

By night:

Two ordinary or bright lights one above the other, visible from all directions, the upper light being red and the lower green; these lights shall be in a suitable position at the top or on the upper part of the mast and not less than 1 m apart.

3. All vessels under sail and simultaneously using their own mechanical means of propulsion shall carry:

By night:

The side lights prescribed in article 3.08, paragraph 1 (b); however these lights may be ordinary, instead of bright;

By day:

A black cone, point downwards.

This cone shall be positioned as high as possible and where it will be most obvious.

4. The provisions of paragraphs 1 and 2 of this article shall not apply to small craft. The provisions of paragraph 2 shall not apply to the vessels referred to in article 3.35.