"US Navy Salvor's Handbook"(PDF). Supervisor of Salvage and Diving. 31 December 2003. Archived from the original(PDF) on 3 March 2016. Retrieved 11 February 2019.
"US Navy Salvor's Handbook"(PDF). Supervisor of Salvage and Diving. 31 December 2003. Archived from the original(PDF) on 3 March 2016. Retrieved 11 February 2019.