Beaumaris and Porthdinallaen lifeboats launched in response to a Mayday call.
The Holyhead coastguard received a mayday call but no position was given they believe the call originated from around the Fort Belan area and launched both lifeboats.
The Beaumaris Inshore Atlantic 85 Lifeboat Annette Mary Liddington was launched at 8.00 pm and made her way to the Caernarfon area and then commenced an inshore search whilst the Porthdinllaen lifeboat searched further out to sea.
In addition to the lifeboats the Bangor and Llandwrog Coastguard Rescue Teams also attended to search the shore line.
As nothing was discovered the U.K Coastguard centre at Holyhead Informed the lifeboats they could return to their respective stations at 8.50 pm.
The lifeboat returned to station at 9.30 pm and was refuelled and prepared for service by 10.00 pm
Notes to editors:
Lifeboat Open Day 2017 will be
Saturday 3 June 11.00 am to 4.00 pm
Celebrating 50 years since the arrival of the first inshore lifeboat
(Blue Peter 11) at the station.
Subject to operational requirements a display by the lifeboat
For more information please telephone John Pulford, Beaumaris RNLI Volunteer Lifeboat Press officer on 07824 764474 or Chris Cousens
R N L I Press officer Wales & west on 01745 585162.
Key facts about the RNLI
The RNLI charity saves lives at sea. Its volunteers provide a 24-hour search and rescue service around the United Kingdom and Republic of Ireland coasts. The RNLI operates over 238 lifeboat stations in the UK and Ireland and more than 240 lifeguard units on beaches around the UK and Channel Islands. The RNLI is independent of Coastguard and government and depends on voluntary donations and legacies to maintain its rescue service. Since the RNLI was founded in 1824, its lifeboat crews and lifeguards have saved over 142,700 lives.