The Inverclyde Now website reports:
Flights require to be booked in advance by calling Lothian Helicopters on their orderline telephone number 01875 320032, Monday to Friday 9am to 5pm, making payment by debit or credit card... The flights will take off and return opposite Auchenfoil Farm on the upper B788 Kilmacolm to Greenock Road where there will be parking available for flight passengers. Within a minute of the flight commencing passengers will be above the Clyde estuary... Additional helicopters will be made available should they be needed.
Map from Maps of Britain.