The Defence Forces said it has monitored a number of foreign warships both outside and inside Ireland's Exclusive Economic Zone (EEZ) this week.
As part of their maritime, defence and security operations, Irish Air Corps Maritime Patrol Aircraft and Irish Naval Service Vessels have observed US, Russian and French vessels in international waters off the island of Ireland.
The Air Corps has also monitored the presence of Royal Air Force combat aircraft south east of, and outside, the Irish EEZ.
The Defence Forces said this activity is in line with the UN Convention on the Law Of the Sea (UNCLOS) rules for transit through international waters.
"These international naval vessels are transmitting on the Automatic Identification System (AIS) and are outside Irish Territorial Waters," it said.
"Territorial waters are 12 nautical miles from the coast of Ireland and, under UNCLOS, there is no restriction on warships operating on the high seas inside and outside of Exclusive Economic Zones."
