The identifiers after each name give the site at which the member works or worked as follows:
|Key to Entries||In Service||Retired/Resigned|
|The Marconi Company||W1||W2|
|Marconi Marine staff||M1||M2|
|Marconi Marine Radio officers||RO1||RO2|
|Cable and Wireless||C1||C2|
|Other Associated organisations||O1||O2|
The dates shown in the lists are those when the person joined Marconi.