Rule 30 - ANCHORED VESSELS AND VESSELS AGROUND

(a)  A vessel at anchor shall exhibit where it can best be seen:

1. in the fore part, an all-round Rule 21. (e) "All-round light" means a light showing an unbroken light over an arc of the horizon of 360 degrees. white light or one ball;
2. at or near the stern and at a lower level than the light prescribed in subparagraph (i), an all-round white light.

(b)     A vessel of less than 50 meters in length Rule 3. (j/i)The words "length" and "breadth" of a vessel mean her length overall and greatest breadth. may exhibit an all-round white light where it can best be seen instead of the lights prescribed in paragraph (a) of this Rule.

(c)     A vessel at anchor may, and a vessel of 100 meters and more in length shall, also use the available working or equivalent lights to illuminate her decks.

(d)     A vessel aground shall exhibit the lights prescribed in paragraph (a) or (b) of this Rule and in addition, if practicable, [Inld] where they can best be seen;

1. two all-round red lights in a vertical line;
2. three balls in a vertical line.

(e)     A vessel of less than 7 meters in length, when at anchor not in or near a narrow channel, fairway or where other vessels normally navigate, shall not be required to exhibit the shape prescribed in paragraphs (a) and (b) of this Rule.

(f)      A vessel of less than 12 meters in length, when aground, shall not be required to exhibit the lights or shapes prescribed in subparagraphs (d)(i) and (ii) of this Rule.

(g)     A vessel of less than 20 meters in length, when at anchor in a special anchorage area designated by the Secretary, shall not be required to exhibit the anchor lights and shapes required by this Rule. [Inld]