Separate to the current vessel shortages which are affecting ferries to Arran there is further disruption to the first and last sailings each day for the time being.
For the second time in a month the navigation lights at Ardrossan are having problems.
So services operating in the hours of darkness are subject to diversion to alternative ports (Gourock or Troon) or cancellation. This will depend day to day on visibility and weather
The harbour is run by Peel Ports, so this is not a CalMac problem.
So while this continues keep a close eye out for notifications from Cal Mac.
The alternative routes via Troon and via Kintyre remain open currently to add capacity and resilience