I edited the language file to show each camera code, in context. My players didn't understand what the default message meant. 

https://imgur.com/gallery/lcSEVA5

I can't speak to any other language, but in the English file (/oxide/lang/en/CargoShipCCTV.json) this is what it looks like now. 

{
  "AnnounceCargoShipCode": "A new Cargo Ship has entered the proximity of the island. Camera codes are\nCARGODECKA{0}\nCARGODECKB{0}\nCARGODECKC{0}\nCARGOHOLDA{0}\nCARGOHOLDB{0}\nCARGOLADDERA{0}\nCARGOLADDERB{0}",
  "AnnounceCargoShip": "A new Cargo Ship has entered the proximity of the island."
}

I hope this helps any other admin that has players wondering what it does.