Required to be used and displayed on and after the 1st November, 1873, in accordance with the 19th section of the Merchant Shipping Act, 1873, if a vessel requires the services of a Pilot.

"In the Day-time.—The following signals, numbered 1 and 2, when used or displayed together or separately, shall be deemed to be signals for a pilot in the day-time, viz.:— " 1. To be hoisted at the fore the jack or other national colour usually worn by merchant ships, having round it a white border, one-fifth of the breadth of the flag; or "2. The International Code pilotage signal indicated by P.T.

"At Night.— The following signals, numbered 1 and 2, when used or displayed together or separately, shall be deemed to be signals for a pilot at night, Viz.:— " 1. The pyrotechnic light, commonly known as a blue light, every fifteen minutes; or "2. A bright white light, flashed or shown at short or frequent intervals, just above the bulwarks, for about a minute at a time." And " Any Master of a vessel who uses or displays, or causes or permits any person under his authority to use or display, any of the said signals for any other purpose than that of summoning a pilot, or uses or causes or permits any person under his authority to use any other signal for a pilot, shall incur a PENALTY not exceeding twenty pounds.".