S.H.I.E.L.D. Helicarrier (Ultimate Avengers)

The S.H.I.E.L.D. Helicarrier is a flying aircraft carrier owned by S.H.I.E.L.D that serves as its capital ship and second main Headquarters.

History
Its early history is largely unknown but it is stated that Stark Enterprises had built that based on the normal U.S. Navy aircraft carrier and sold it to S.H.I.E.L.D. for an expensive price that limits only one at a time.

It was seen landing at the S.H.I.E.L.D. Headquarters' docks as Captain America who awoken from his decades-long frozen slumber, seeing that the world has changed.

When the Chitauri warships are commencing their attack, the S.H.I.E.L.D. Helicarrier was sent to stop their attack but failed because their weapons cannot penetrate their vibranium armor and was shot down causing it to crash land into the water burning.

After the Chitauri attack was repulsed by the Avengers, the S.H.I.E.L.D. Helicarrier was under extensive repair and maintainance including upgrading its weapons systems.