(1)"Mast head light" 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 degree and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel. This light shall be placed as far as practicable at height above the hull of not less than 3 meters for vessels of 20 meters or more in length and 2 meters for vessels of less than 20 meters in length.
