Coastguards have begun searching for a man feared missing in the Severn Estuary.
The alarm was raised this morning when it was noticed no-one was aboard a sailing vessel on the St Pierre Pill, near Chepstow.
Swansea Coastguard said the boat's owner had been on board Friday evening doing some work and had agreed to meet a friend the next day.
However, the man was nowhere to be seen the following morning.
A spokesman confirmed the search efforts were "ongoing" and it was believed the missing man had been the only person aboard the sailing vessel.
The Airport Commission has received a formal proposal to build an international airport in the Severn Estuary, near Caldicot.
If given the go-ahead, it would cost an estimated £5bn and take seven years to build.
The commission will consider 40 proposals for UK airports - including one for a revamped Cardiff Airport - over the next few months.