Roxy, I hope our more knowledgeable members are going to chime in here, but the answer probably has something to do with the two very different tasks
Titanic's Marconi operators had to do. They were, of course, given the responsibility for communicating information regarding the ship itself - position, distress calls, anything that had to do with the actual business of operating a ship at sea. That would have been a responsibility to White Star Line, obviously.
But there was another side to Marconi's presence aboard
Titanic - that of providing ship-to-shore messaging for those passengers desiring it. It was a very lucrative service; cost was 12s 6d for the first ten words, and 7d per word thereafter (one 1912 shilling was supposedly worth about £3.29 today, meaning that those first ten words cost around £40 - over $62 in today's U.S. dollars). It was a fairly new and technically advanced service for its time, roughly equivalent to having access to a satphone today. Essentially, it was wireless telegraphy, with Morse code dots and dashes being transmitted by radio instead of over telegraph wires, then decoded and set down in words on a telegram blank for delivery to the recipient. Such a message was called a Marconigram.
The story goes - and I'm not vouching for it, because if I've learnt anything here, it's to check with the experts - that the Marconigram service was so popular with
Titanic's First Class passengers that it interfered with WSL traffic - that Phillips and Bride, the Marconi operators aboard, could not keep up with both as smoothly as might have been desirable.
On the Titanic Radio Page (
THE TITANIC RADIO PAGE ) it is said that 250 passenger messages, both incoming and outgoing, were handled between the time
Titanic left Southampton and the collision. That would have meant some serious revenue for Marconi! The Titanic Radio Page states that Philips and Bride were employed by Marconi, but that they received their pay from White Star Line, which may or may not be entirely correct, so if any of our experts disagree with that, I hope they'll speak up.