Helms must always give way to power craft in the river and harbour mouth, and harbour regulations must be obeyed. Any person violating these regulations will be disqualified.
The most important restriction concerns movement of boats out of the east and west arms into the harbour entrance.
Signals are made on the middle pier as follows:
- An amber light occulting every 3 seconds on the middle pier control station, forbids entrance to the harbour from the sea.
- A red light occulting every three seconds over the western arm, forbids movement in the western arm (the river).
If moving in the harbour area when the signals are displayed you must get clear of the main channel as soon as possible and keep to the sides.