The electro-magnetic master clock (on Olympic at least) was in the chart room. The clock did not show seconds, only minutes, and was in a weatherproof case. Captain Smith is on record as saying ‘when the minute hand comes to past the line of the minute, the effect is that the finger moves and that releases the contact, and the whole [hand] goes with a jump.’ Smith also said ‘We have two [master clocks]. They have a large system in the ship, and they put in two [clocks] to work the whole lot.’ That implies to me that they kept the same time and there were two clocks because of the number of clocks onboard. There was a wheelhouse clock too. I'm a bit of an idiot as far as this topic is concerned, that's the only information I have to hand -- make of it what you will.
