The Rules of the Air Regulations 1991

Airships

15.—(1) Except as provided in paragraph (2), an airship while flying at night shall display the following lights:

(a) a steady white light of at least five candela showing through angles of 110° from dead ahead to each side in the horizontal plane;

(b) a steady green light of at least five candela showing to the starboard side through an angle of 110° from dead ahead in the horizontal plane;

(c) a steady red light of at least five candela showing to the port side through an angle of 110° from dead ahead in the horizontal plane;

(d) a steady white light of at least five candela showing through angles of 70° from dead astern to each side in the horizontal plane; and

(e) an anti-collision light.

(2) An airship while flying at night shall display, if it is not under command, or has voluntarily stopped its engines, or is being towed, the following steady lights:

(a) the white lights referred to in paragraph (1)(a) and (d);

(b) two red lights, each of at least five candela and showing in all directions suspended below the control car so that one is at least 4 metres above the other and at least 8 metres below the control car; and

(c) if the airship is making way but not otherwise, the green and red lights referred to in paragraph (1)(b) and (c):

• Provided that an airship while picking up its moorings, notwithstanding that it is not under command, shall display only the lights specified in paragraph (1).

(3) An airship, while moored within the United Kingdom by night, shall display the following steady lights:

(a) when moored to a mooring mast, at or near the rear a white light of at least five candela showing in all directions;

(b) when moored otherwise than to a mooring mast:

(i) a white light of at least five candela showing through angles of 110° from dead ahead to each side in the horizontal plane; and

(ii) a white light of at least five candela showing through angles of 70° from dead astern to each side in the horizontal plane.

(4) An airship while flying by day, if it is not under command, or has voluntarily stopped its engines, or is being towed, shall display two black balls suspended below the control car so that one is at least 4 metres above the other and at least 8 metres below the control car.

(5) For the purposes of this rule:

(a) an airship shall be deemed not to be under command when it is unable to execute a manoeuvre which it may be required to execute by or under these Rules;

(b) an airship shall be deemed to be making way when it is not moored and is in motion relative to the air.