USN training. This area is used frequently as it is relatively clear of the main shipping & air routes.
Boatfag will probably spot several ships including a carrier in the area.
KC-10 is a tanker/transport refuelling other planes.
C-2A is a navy carrier-onboard-delivery COD plane probably doing some deck landing practice or ferrying some people/cargo from ship-shore.
E-2 might be doing some deck training or battle management training.