An FAI has been told it would not be realistic to expect the same levels of safety from offshore helicopters as jet aircraft.
Unite said it had been unable to convince Archer to use the UK Government’s Job Retention Scheme.
The decision was taken because of ongoing government restrictions due to the coronavirus pandemic.
The company is concerned about bringing staff together to work on the upgrade during the coronavirus outbreak.
BP confirmed it has flown one suspected case off the Clair Ridge platform.
The rare visitor was identified swimming through an offshore wind farm 17 miles off the east coast.
Proceedings were disrupted twice by hecklers in the gallery, who were led away by police.
The Scottish White Fish Producers' Association said quotas would make conditions "extremely challenging".