Hull and machinery insurances are normally placed with a group of insurers. The assured will often employ a broker to assist with negotiation and contract administration. A central feature of claims administration is to give one of the insurers the power to act on behalf of all the insurers involved in matters relating to claims — the claims leader. Casualty handling, in particular, has become very demanding due to the increasing technical complexity of vessels, media attention and the need to deal with authorities in a wide variety of jurisdictions.