All-round light-A light showing an unbroken light over an arc of the horizon of 360°.
Docking light-A flood or spotlight type of light permanently installed or permanently mounted on a motorboat that is used to illuminate a boat's forward course of travel.
Flashing light-A light flashing at regular intervals at a frequency of 120 flashes or more per minute.
Masthead light-A white light placed over the fore and aft centerline of the boat showing an unbroken light over an arc of the horizon of 225° and fixed as to show the light from right ahead to 22.5° abaft the beam on either side of the boat, except that on a boat of less than 39.4 feet (12 meters) in length, the masthead light must be placed as nearly as practicable to the fore and aft centerline of the boat.
Restricted visibility-A condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or other similar causes.
Sailboat-A boat under sail provided that propelling machinery, if fitted, is not being used.
Sidelights-A green light on the starboard (right) side and a red light on the port (left) side, each showing an unbroken light over an arc of the horizon of 112.5° and fixed as to show the light from right ahead to 22.5° abaft the beam on its respective side. On a boat of less than 65.6 feet (20 meters) in length, the side lights may be combined in one lantern carried on the fore and aft centerline of the boat. On a boat of less than 39.4 feet (12 meters) in length, the sidelights when combined in one lantern must be placed as nearly as practicable to the fore and aft centerline of the boat.
Special flashing light-A yellow light flashing at regular intervals at a frequency of 50 to 70 flashes per minute, placed as far forward and as nearly as practicable on the fore and aft centerline of the tow and showing an unbroken light over an arc of the horizon of not less than 180° nor more than 225° and fixed as to show the light from right ahead to abeam and no more than 22.5° abaft the beam on either side of the boat.
Sternlight-A white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135° and fixed as to show the light 67.5° from right aft on each side of the boat.
Underway-A boat that is not at anchor, made fast to the shore or aground.
58 Pa. Code § 95.3
The provisions of this §95.3 amended under the Fish and Boat Code, 30 Pa.C.S. § 5123.
This section cited in 58 Pa. Code § 105.1 (relating to conditions requiring immediate corrective action).