SOS is a really versatile distress call. You can shout it; you can tap it out in Morse code; you can honk it on a horn; you can signal it with flashes of light; you can spell it out on the beach with debris from your wrecked ship.
Explaining where SOS came from and what it means are maritime archivist Christian Ostersehlte from the German Maritime Museum, and Paul Tyreman from PK Porthcurno, the Museum of Global Telecommunications.
There are a couple of category B swears in this episode.
The music is by Martin Austwick. Hear Martin’s own songs at palebirdmusic.com or search for Pale Bird on Bandcamp and Spotify, and he’s @martinaustwick on Twitter and Instagram.
Podden och tillhörande omslagsbild på den här sidan tillhör Helen Zaltzman. Innehållet i podden är skapat av Helen Zaltzman och inte av, eller tillsammans med, Poddtoppen.