And the manner in which they indicate to the vessel which sees them the position and 1 description of the vessel that carries them.

When both Red and Green 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.; A If A. sees a white mast-head light above the other two, she knows that B. is a steam vessel.

When the Red, and not the Green Light, is seen: A sees a red light ahead or on the bow ;—A. knows that either, 1. a vessel is approaching her on her port bow, as B. ; or, 2, a vessel is crossing in some direction to port, as D. D. D.

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 IX D. D.

When the Green, and not the Red Light, is seen: A. sees a green light ahead of on the bow;—A. knows that either, 1, a vessel is approaching her on her starboard bow, as B.; A B or, 2, a vessel is crossing in some direction to starboard, as D. D. D.

;— 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 D. D. D.