[1] Shippingport has two 25 ton portal gantry cranes on tracks,[2] one running along the top deck of each hull side superstructure.

[3] She is a government owned, private contractor operated, restored and certified drydock used to execute submarine repairs.

[4] In October 2010, while Shippingport (ARDM-4) was nearing the end of her overhaul at BAE Systems Ship Repair at Norfolk, Virginia,[1] the U.S. Department of Defense (DoD) announced that General Dynamics Electric Boat was awarded an additional $6.5 million to its contract for ship forces duties during Shippingport's naval service craft overhaul (SCO) and recertification.

[4] The SCO included structural modifications to enable a lifting capacity to support a Virginia-class (SSN) nuclear attack submarine.

In November 2013, General Dynamics Electric Boat announced it was awarded an additional $7.1 million contract by Naval Sea Systems Command (NAVSEA) for further repairs and preservation of floating dry dock Shippingport (ARDM-4), with the work to be completed by September 2014.