The Rig Manager is the overall supervisor of the rig and coordinates the work of the crews on each rig and the work of any additional crewmen or technicians who may be assigned to them. The Rig Manager normally learns his job through on-the-job training by working up through the ranks of the basic crew. Such experience is necessary in order for him to be able to manage the operation and take over the running of the rig in emergencies or assist in times of peak load, particularly during rig-up and rig-down operations. Many have had academic training, both in accredited and industry sponsored short courses to improve their skills. They normally do not qualify, however, until they have had apprenticeship in the basic duties of each crewmember.