The fact that many helicopter operations take place throughout the world every day underlines the inherent safety and usefulness of the helicopter.
The choice of a helicopter for a particular task is one which requires a high degree of technical aviation knowledge.
Marine helicopter operations demand a clear understanding of safety requirements for both the ship and the aircraft. Twin engine helicopters are always to be preferred for helicopter/ship operations. Single engine helicopters should only be used for transfers to ships on which a suitable recommended landing area is available. In some cases, national and international regulations may stipulate the use only of twin engine machines.