Deputy Chief of Naval Operations

Deputy Chief of Naval Operations is a title held by high-ranking UNSC Naval personnel with a seat on the UNSC Security Committee, and is traditionally held by a Vice Admiral.

The former Deputy Chief of Naval Operations, Vice Admiral Danforth Whitcomb, was given tactical command of the Reach Theatre of Operations after Reach HighCom was overrun by Covenant forces. He and a number of Spartan-II personnel were rescued by the survivors of the Halo conflict, and he eventually met his death crashing a captured Covenant ship into an enemy space installation. It is unknown whether a new Deputy Chief of Naval Operations has been appointed.

In the modern US Navy, the position is also called the Chief of Naval Personnel.