Air traffic controllers plan strike day in May
Prospect members had postponed industrial action in April, but talks with HIAL broke down last week.
A 24 hour period of disruption is planned for the 23 May 2019 affecting airports in Inverness, Dundee, Wick, Kirkwall, Sumburgh, Stornoway, and Benbecula.
Prospect had previously called off a day of strike action on 26 April 2019 to allow the company to develop new proposals.
David Avery, Prospect negotiations officer, said: 'Members have run out of patience with HIAL. Talks have been ongoing for more than a year to seek to resolve this dispute but to no avail.
'Prospect agreed to withdraw our strike action in April to allow further talks to take place. and Members trusted that HIAL would use that time to bring forward proposals to resolve the dispute - HIAL have abused that trust.
'Members do not want to take industrial action but have been left with no choice. If they want to prevent disruption across the highlands on 23 May and throughout the summer then Scottish Ministers need to intervene.'
HIAL managing director Inglis Lyon, said: 'We are bitterly disappointed talks have not delivered a resolution. The union continues to insist on a double-digit wage increase that greatly exceeds government pay policy.
'In addition, the evidence provided in the analysis of air traffic controller pay at non-HIAL airports that Prospect jointly undertook with HIAL does not support a double-digit pay award.
'We are progressing on the assumption strike action will go ahead. We will work closely with our airlines to minimise potential disruption wherever possible.'