(1) Seaports are compulsory pilotage ports and all ships other than exempted ships, navigating whether by entering, leaving or moving within their limits shall be under the pilotage of an Authority pilot.
(2) For the purposes of this section the following ships are exempted ships—
(a) ships belonging to Her Majesty;
(b) ships owned or operated by the Authority;
(c) pleasure yachts or fishing vessels;
(d) ferrying boats plying as such exclusively within the limits of a port;
(e) ships of less than 100 tons gross register;
(f) ships trading exclusively between seaports and other parts of the State;
(g) tugs, dredges, barges or similar vessels whose ordinary course of navigation does not extend beyond the limits of the State.
(3) The General Manager may exempt from compulsory pilotage any ship in any particular case.