The new Minsiter for Defence, Helen McEntee, has been briefed by the Defence Forces Chief of Staff on the movement’s of a Russian spy ship operating off Scotland.
It is understood the Defence Forces are preparing to deploy a naval ship to monitor a Russian surveillance vessel should it move closer to Irish waters.
It appeared that the vessel, the Yantar, was sailing north on Thursday afternoon. However, sources warned this could change as the ship’s movements have been erratic in recent months.
Sources said at least one Naval Service vessel and a maritime patrol aircraft are on standby to deploy to waters off the north coast if the Yantar travels south from its current position off the Scottish coast.
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Britain has also warned Russia that it is prepared to take military options should the spy ship sail further south.
[ Russian spy ship on course for Irish watersOpens in new window ]
A spokeswoman for Ms McEntee said she was briefed on Thursday by Lieut Gen Rossa Mulcahy as well as officials from the Department of Defence.
“It is not appropriate to comment on operational decisions which may be taken around the deployment of military capabilities,” she said.
“However, the Naval Service and the Air Corps routinely carry out Maritime Defence and Security Operations in Ireland’s territorial seas and exclusive economic zone (EEZ). In addition, the Naval operations command centre in Haulbowline carries out remote monitoring 24 hours a day, seven days a week.”
The British ministry of defence opted to relax its rules of engagement to allow royal navy ships to closely shadow the Yantar, which is currently just outside UK territorial waters.
Britain decided to do this after the Yantar allegedly fired lasers at an RAF maritime patrol aircraft sent to monitor it in an apparent effort to interfere with the pilots.
The Yantar, which Russia maintains is an oceanographic research vessel, has had its automatic identification system switched off since shortly after leaving the port of Algiers in Algeria almost a year ago.
This means it is not visible on open-source platforms.
Aircraft monitoring platforms show a concentration of RAF aircraft near the Inner Hebrides, off Scotland, suggesting the Yantar is likely in the same area.
The vessel has sailed into the Irish Sea twice since last year, causing the Naval Service and Air Corps, along with their British equivalents, to deploy aircraft and vessels.
“Russia, we see you. We know what you are doing. And if Yantar travels south this week, our forces are ready to act,” said British defence secretary John Healey on Wednesday.
Britain’s authorities are sharing detailed information with the Naval Service on the Yantar’s position and course, said sources.
It has yet to enter the Republic’s Exclusive Economic Zone (EEZ). The Air Corps has one C295 maritime patrol aircraft available to deploy should this change. Another is in Spain for maintenance.
A Defence Forces spokesman said the organisation does not comment on “specific operational matters” but that it continuously monitors the EEZ.
“We maintain a routine presence throughout our EEZ as a standard operational output of the Defence Forces ... and any relevant information gathered is shared with the appropriate national and international authorities.”
The Yantar is widely believed by western military intelligence to be equipped to conduct surveillance, and possible sabotage, on critical marine infrastructure such as gas pipelines and communications cables. The ship, which has a crew of 60, is believed to be capable of deploying autonomous undersea drones that could interfere with subsea infrastructure.
At one stage last year, during a previous visit to the Irish Sea, military personnel from the Republic observed three drones in the air that appeared to be under the control of the Yantar.
