Air traffic controllers in the Highlands and Islands are to strike next month in a dispute over pay.
Prospect union said that Dundee, Inverness, Wick, Kirkwall, Sumburgh, Stornoway, and Benbecula airports will be affected by the strike action on April 26.
Air traffic controllers working for Highlands and Islands Airport Limited (HIAL) will also begin action short of a strike on April 1 which will carry on until August 31.
It will include an overtime ban, an instruction to work to rosters and the withdrawal of good will.
Prospect claims members’ pay has fallen significantly behind the rest of the industry due to public sector pay restraint.
The union said it will seek to agree a protocol with HIAL to ensure cover for emergency incidents during the period of the strike.
David Avery, Prospect negotiations officer, said “Prospect members have agreed to delay any strike action until after the Scottish school holidays have concluded.
“Our members do not want to stop their friends and neighbours visiting their families during the school holidays.
“I urge HIAL and Scottish Ministers to use the additional time members have given them to bring forward real proposals to resolve the dispute rather than the same offer which has already been rejected twice.”
Prospect last week said that 88% of controllers had voted for strike action, with 90% backing action short of a strike.
HIAL managing director Inglis Lyon said: “We are disappointed by the proposed action and the likely impact on the Highlands and Islands.
“We will meet with Prospect on Friday, March 8, to explore potential solutions.
“However, Prospect is pursuing an increase in basic pay of at least 10% and has recently sought parity with London airports which is beyond what HIAL can offer as we are government owned and must adhere to the Scottish Government’s pay policy.
“We are working closely with our airline operators to minimise the disruption of industrial action and apologise in advance for the inconvenience this may cause.”
A Scottish Government spokesman said: “It is disappointing to see the union announcing strike action, which will clearly impact passengers. We encourage both parties to continue dialogue in an effort to reach an agreement.
“HIAL has implemented a pay rise for all staff, which is a significant improvement on previous years, as well as significantly increasing their contribution to their pension scheme in order to maintain this benefit for employees. Staff also continue to receive generous annual leave, sick pay and other allowances.
“In the face of the UK Government’s continued budget cuts, the Scottish Government delivered a distinctive and progressive Pay Policy for 2018/19 – one which is fair, supports those on lower incomes and protects public sector jobs and services while delivering value for money for the people of Scotland.”
Orkney’s MSP, Liam McArthur, Lib Dem, has written to Transport Secretary, Michael Matheson MSP, asking him to “do everything possible to bring both sides together in a bid to avoid this damaging industrial action taking place.”
He and fellow Lib Dem Tavish Scott, MSP for Shetland, said: “There is absolutely no doubt that any industrial action on these routes would be hugely damaging to our island communities.
“From isles patients attending hospital appointments to local businesses trying to remain competitive, these services are a genuine lifeline.
“Even at this late stage, we would urge HIAL and the unions to get back round the table and resolve this dispute.
“Ministers must do everything possible to help broker a resolution and avoid the massive disruption any airport closures would inevitably cause.”
Scottish Greens transport spokesman and Highlands and Islands MSP John Finnie said: “The Scottish Ministers own HIAL and have a responsibility to ensure this situation is resolved urgently, with a fair settlement for staff.
“It’s perhaps no surprise that the Transport Secretary refused to say he had confidence in HIAL’s management the last time I asked him. I continue to offer solidarity to Prospect and its members.”