 The helicopter is marketed for passenger transport, offshore support, VIP corporate transport and casualty transport duties.In 2015, the EC155 was formally renamed to the H155, in line with Eurocopter's corporate rebranding as Airbus Helicopters.Originally designated AS365 N4, the EC155 was developed from the Eurocopter AS365 N3 Dauphin 2 with the aim of significantly increasing the cabin space of the Dauphin.