Preliminary results from an examination of a shipwreck lying off the Wexford coast indicate it could be one of the most important such vessels to be examined in years.
Divers from the state heritage service, Dúchas, have spent the past two weeks carrying out underwater surveys of the shipwreck.
The ship is lying at the bottom of the River Suir estuary near Duncannon fort.
Dúchas divers believe the ship is called 'The Great Louis', and was part of the confederate fleet under Cromwell that attacked Duncannon fort around 1645.
The ship is located in the main shipping line of Waterford harbour, one of the busiest shipping lanes in the country.
The shipwreck was first discovered when the area was being dredged.
Divers are today continuing to examine the shipwreck but are said to be very excited about their preliminary findings.