In length, from the eastern jetty of the old, harbour.
The north jetty is 4 000 ft.
Along the shore in a southerly direction from the long jetty which protects the entrance to the port.
A jetty exceeding a quarter of a mile in length permits the approach of vessels at all tides.
The harbour, lying to the east of the town, is protected on the south by a peninsula which carries the citadel and terminates in the Citadel jetty; to the south-west of this peninsula lies the Place Bonaparte, a quarter frequented chiefly by winter visitors attracted by the mild climate of the town.