Did cortana contact the unsc?
Yes, multiple times. Cortona is a UNSC serial AI; she is a smart
AI created by the ONI, a branch of the UNSC, to provide in-field
assistance and information to soldiers. She was assigned to Master
Chief due to the restraints of the Cole Protocol, and has contacted
the UNSC before and after she was assigned to Master chief. If you
are talking about Halo 3, Cortona did not directly contact the
UNSC. She left a message fragment in the crahsed flood-infested
ship, and occasionly contacts the Master Chief. When she was
rescued by Master Chief, she helped out the UNSC until Master chief
and the Arbiter escpaed the replacment Installation 04 (the Halo
destroyed by Master Chief in the first game). She did send a beacon
at their location when the UNSC frigate "Forward unto dawn" was cut
by the slipspace portal's collapse, but she did not directly
contact the UNSC when Master Chief went into cyrosleep either.