However, he said the Civil Aviation Authority thought differently.
"There is a difference in opinion as to what that letter conveyed - for the plaintiff it's intended that it provided a level of comfort that they were on the right path," he said.
Mr Dale said there were differing opinions about the safety record of the Wessex helicopters.
However, the CAA's lawyer, Les Taylor QC, said the authority followed a thorough process when making its decision.
He said the case lacked focus.
"This case suffers from an absolute lack of focus as to what the plaintiff's case is - what it needs to prove and what is relevant and what is not relevant," he said.
The case before Justice Cooke is set down for up to eight weeks.