Latest: The army will be on standby to deal with emergencies as a result of a strike by ambulance personnel tomorrow.
500 crew members, who are part of the Psychiatric Nurses Association, are in dispute with the HSE over union recognition rights.
They'll hold pickets outside bases across the country from 7am until 5pm.
The National Ambulance Service says a detailed contingency plan is in place.
Managers will be performing frontline duties, the Department of Defence has crew ambulances on standby and it's expected personnel from other unions will work as normal.
Earlier (1:38pm): Ambulance crew strike action to go ahead tomorrow
500 ambulance personnel are to go ahead with planned strike action tomorrow.
The crew members, who belong to the Psychiatric Nurses Association, will hold pickets outside ambulance bases in Cork, Dublin and other locations across the country between 7am and 5pm.
They are in dispute with the HSE over union recognition.
It is not clear what contingency plans have been put in place to deal with any disruption to ambulance services tomorrow.