Rule 24 Towing & Pushing

a) A power-driven vessel when towing shall exhibit:

(i) instead of the light prescribed in Rule 23(a)(i) or (a)(ii), two masthead lights in a vertical line. When the length of the tow, measuring from the stern of the towing vessel to the after end of the tow, exceeds 200 meters,

three such lights in a vertical line;

(ii) sidelights;

(iii) a sternlight;

(iv) a towing light in a vertical line above the sternlight; &

(v) when the length of the tow exceeds 200 meters, a diamond shape where it can best be seen.

Power-driven vessel towing astern—towing vessel less than 50 meters in length;

length of tow exceeds 200 meters.

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Same for Inland

83.23(a)(i) and (ii)), two masthead lights in a vertical line. When the length of the tow, measuring from the  stern of the towing vessel to the after end

of the tow exceeds 200 meters, three such lights in a vertical line;

(ii) Sidelights; 

(iii) A sternlight;

(iv) A towing light in a vertical line above the sternlight; and

(v) When the length of the tow exceeds 200 meters, a diamond shape where it can best be seen.

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(e) A vessel or object other than those referred to in paragraph (g) of this Rule being towed shall exhibit:

(i) Sidelights;

(ii) A sternlight; and

(iii) When the length of the tow exceeds 200 meters, a diamond shape where it can best be seen.

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(e) A vessel or object being towed, other than those mentioned in paragraph

(g) of this Rule, shall exhibit:

(i) sidelights;

(ii) a sternlight;

(iii) when the length of the tow exceeds 200 meters, a diamond shape where it can best be seen.

Same for Inland. 

Rule 24

(b) When a pushing vessel and a vessel being pushed ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel and exhibit the lights prescribed in Rule 23 (§ 83.23).

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A power-driven vessel when towing shall exhibit:

(i) instead of the light prescribed in Rule 23(a)(i) or (a)(ii), two masthead lights in a vertical line. When the length of the tow, measuring from the stern of the towing vessel to the after end of the tow, exceeds 200 meters,

three such lights in a vertical line;

(ii) sidelights;

(iii) a sternlight;

(iv) a towing light in a vertical line above the sternlight; and

(v) when the length of the tow exceeds 200 meters, a diamond shape where it can best be seen.

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

(i) in the fore part, an all-round white light or one ball;

(ii) 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 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.

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A vessel constrained by her draft may, in addition to the lights prescribed for power-driven vessels in Rule 23, exhibit where they can best be seen three allround red lights in a vertical line, or a cylinder.

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Rule 27 (e) Whenever the size of a vessel engaged in diving operations makes it impracticable to exhibit all lights and shapes prescribed in paragraph (d) of this

Rule, as appropriate, the following shall instead be exhibited:

(i) Three all-round lights in a vertical line where they can best be seen. The highest and lowest of these lights shall be red and the middle light shall be white;

(ii) A rigid replica of the International Code flag “A” not less than 1 meter in height. Measures shall be taken to ensure its all-round visibility.

Port Side ICW Only

Color

Numbered or Lettered

Color of Light

Pattern of Light

Red Right Returning to Texas

Color:    Green w/ yellow square

Odd Numbers Only

Green Lights Only

Isophase, Occulting, flashing, quick flashing, Group Flash (2)

Special Marks, Lateral System

Color

Numbered or Lettered

Color of Light

Characteristic of Light

Dual Purpose Buoy where ICW and other waterways coincide

Color

Number or Lettered

Light Color

Light Pattern

Port Side (Right Descending Bank)

Western Rivers

Color

Numbers or Letters

Color of Light

Pattern of Light