"Naval Ranks NMRN Portsmouth". www.nmrn-portsmouth.org.uk. Portsmouth, England: The National Museum of the Royal Navy. 2015. Archived from the original on 26 September 2019. Retrieved 13 February 2019.
"Naval Ranks NMRN Portsmouth". www.nmrn-portsmouth.org.uk. Portsmouth, England: The National Museum of the Royal Navy. 2015. Archived from the original on 26 September 2019. Retrieved 13 February 2019.