Restrictions in place for almost four weeks during major flap gate works
Douglas inner harbour will be closed to all vessel traffic for the majority of next month while major works take place.
The flap gate, which retains water in the marina, needs to be removed and overhauled.
The project is due to get underway on 5 October and be completed by 28 October, but is weather dependent.
The Department of Infrastructure will also carry out inspections to see if other repairs are needed during the closure.