Paragraph 16 Airships by dayI1

An airship flying during the day in any of the circumstances referred to in paragraph (2) must 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.

The circumstances are that—

For the purposes of this rule an airship is not under command when it is unable to execute a manoeuvre which it may be required to execute by these Rules.