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Rules of the Road
Lights & Shapes, Rule 21-International
Definitions
(a) "Masthead light" means a white light placed over the fore and aft centerline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from the right ahead to 22.5 degrees abaft the beam on either side of the vessel.
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A powerboat is operating at night from which directions must the white masthead light be visible?
Rule 21 of the Navigational Rules of the Road. (a) "Masthead light" Means a white light placed over the fore and aft center-line of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed to show the light from right ahead to 22.5 degrees abaft of the beam on either side of the vessel, except that on a vessel of less than 12 meters (39'4") in length the masthead light shall be placed as nearly as practical to the fore and aft center-line of the vessel.
On power-driven vessals what are the navigation lights?
Generally they are masthead light, port and starboard steaming light and stern light. Others may be displayed depending on the length of the vessel and what duties it is carrying out.
What should you do if you see a green and white light on a vessel at night?
The green light would be the starboard steaming light, the white the masthead light. What you would do would depend on factors such as its releative bearing and in what waters you are sailing.
What does it mean when you see only a red and a green light on a vessel at night?
Navigation lights, green starboard and red port. Masthead and stern lights should be white
What should you do if you see a red and a white light on a vessel at night?
Without seeing the actual configuration there isn't enough information to make a decision. Am I seeing the port side aspect of of the vessel? A port side running light at 112.5 degrees and a masthead light at 225 degrees? Where are the lights in relation to each other?
Is a white masthead light the same as an anchor light?
Yes, it is.
A powerboat is operating at night Which of these lights must be shown?
A white masthead light must be shown when a powerboat is operating at night.
What is the Arc of visibility of masthead light?
225 degrees
What are the characteristics of nav lights on a power driven vessel?
The characteristics of navigation lights on a power driven vessel includes sidelights, sternlight, masthead light, and all-round white lights. Navigation lights must be displayed from sunset until sunrise as well as anytime visibility is restricted.
If a powerboat is operating at night from which direction should the white masthead light be visible?
The masthead light should be visible in a 225 degree arc centered on dead ahead.
In addition to an all round white light what light must power-driven vessels less than 65.6 feet exhibit when underway between sunset and sunrise?
Rules of the RoadInternational/InlandLights & shapesRule 23-Power-driven vessels underway(a) A power-driven vessel underway shall exhibit:(i) a Masthead light forward;(ii) a second masthead light abaft of and higher than the forward one; except that a vessel of less than 50 meters in length shall not be obliged to exhibit such a light but may do so;(iii) sidelights; and(iv) a stern light*note on side lights. Red is port side (left) and green is starboard side (right)
A 12 meter powerboat anchored at night must display which light?
I believe it is a white masthead light.
