The risk management review forms the final component of the model. Within any management system, a feedback loop that allows operations to be reviewed and procedures and policies to be modified in the light of experience is vital. Some operators stated that it was a formal requirement for their leaders to submit a written report at the end of each trip as part of their contracts,whilst others used a verbal reporting format. Client questionnaires were also completed post-trip by a number of operators and,whilst no specific safety comments were requested,all operators felt that any concerns would be brought up.