By sea, Clyde Marina has 24 hour all tide access, with a minimum depth of 4.5 metres above chart datum.
The approach to the south of Horse Island is well lit at night with clear leading lights and traffic control lights indicating the traffic status of the harbour, please study the light sequence > and observe this during entering or leaving the harbour.
Please refer to Reeds Nautical Almanac area 9 SW Scotland

ARDROSSAN HARBOUR - TRAFFIC CONTROL SIGNAL LIGHTS
Mariners are reminded that the control of traffic at Ardrossan harbour is by light signals in addition to the VHF Station.
Traffic Lights are mounted on the sea wall south of the lighthouse, on the middle quayside within the harbour plus at the marina entrance.
For further information on the Marina Traffic Signals click here