a. lead the diving operation, b. ensure that the health and safety of the diver and other employees are attended to during the preparations for and execution of the diving operation, c. establish communication with the diver, d. know the length of the umbilical that is in the water at all times, e. make sure a log is kept of the diving operation, f. lead the surface decompression in the hyperbaric chamber and ensure that decompression is carried out safely and make sure injured divers receive treatment in accordance with applicable procedures and the advice of an approved diving medical physician, g. interrupt the diving operation if it is unsafe to continue, and h. assist the diver in the form of tools and equipment.
a. help check that the diving equipment is water-tight and functions properly before the diving operation begins, and that the lifeline or umbilical is securely fastened to the diver, and b. be ready for immediate assistance by intervening or assisting the diver in an emergency. The standby diver must be located at the surface, already fully dressed with his mask off and ready to enter the water as quickly as possible and at the latest within one minute. In a pool such as a swimming pool with a depth of up to six metres, the standby diver does not need to be fully dressed already. For public safety diving and training for public safety diving, the standby diver may be in the water if it is safe, provided a diving supervisor and a line attendant are present at the surface. c. The standby diver must have a minimum of 15 minutes of bottom time available without any previous dive that limits his function as a standby diver.
a. be responsible for the lifeline both during the execution of the diving operation and in an emergency, b. handle communication with the diver using lifeline signals, c. know the length of the umbilical at all times, d. watch the diver's actions and movements as far as possible, and e. maintain an overview of activities in the area and inform the diving supervisor of this.