While it is true that British wireless operators rarely used the "SOS" signal at the time, preferring the older "CQD" code, "SOS" had been used internationally since 1908.
Memang benar operator nirkabel Britania jarang sekali memakai sinyal "SOS" pada masa itu dan memilih kode "CQD", "SOS" sudah dipakai secara internasional sejak 1908.