The 1st AD Is responsible for breaking down all elements presented in a script, working with the Director and the DP to develop the shooting plan and schedule, and then making it all actually happen on set. A 1st AD must be a strong leader throughout both prep and the shoot, as well as a brilliant puzzle-master with an excellent mind for logistics, understanding of camera angles and techniques, and great communications skills.
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Defined By The D.G.C

A 2nd Assistant Director must be a genius organizer and communicator, as his/her function is to create the daily call sheet and all related prep and shoot documentation in consultation with the 1st AD and all Department Heads, ensuring that all required elements are reflected and scheduled for each day of the shoot.
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Defined By The D.G.C
