Article 54
The limits of the harbour within which the undertaker must exercise jurisdiction as the harbour authority and within which the powers of the harbour master are exercisable must be the area bounded by an imaginary line commencing at the shore north of the authorised development at 52°14’0’’, 1° 37’ 37’’, then extending in a straight line to a point at 52°14’0’’, 1° 41’ 0’’, then extending in a straight line to a point at 52° 12’ 0’’, 1° 41’ 0’’, then extending in a straight line due west to the coast to a point at 52° 12’ 0’’, 1° 37’ 20.8, then following the level of Highest Astronomical Tide (HAT) to the point at 52°14’0’’, 1° 37’ 37’’. Discrete lines of latitude and longitude have been chosen as these are easier for mariners to use in the absence of any suitable landmarks.