«The Sygna - 40 years on». Australian Broadcasting Corporation. 22 de mayo de 2014. Archivado desde el original el 23 de marzo de 2017. «After stranding itself at Stockton Bight in 1974, wreckage of the 53,000 ton freighter, known as the Sygna, has become part of Newcastle's landscape.»
«The Sygna - 40 years on». Australian Broadcasting Corporation. 22 de mayo de 2014. Archivado desde el original el 23 de marzo de 2017. «After stranding itself at Stockton Bight in 1974, wreckage of the 53,000 ton freighter, known as the Sygna, has become part of Newcastle's landscape.»