I have to make this short. Geoffrey Marcus is correct...it's a common-sense practice and the kind of blanket CYA that is found in many official regulations. But Dave is also correct...the Marconi operator is not the one to determine when a dangerous situation was developing. Of course a Marconi operator will stay on duty during a dangerous situation...the key is knowing when that situation exists.
Marcus is correct when he states that Evans should have stayed on duty, but not for the reason stated above. I argue that Evans should have stayed on duty until he carried out his Master's order; specifically, Lord ordered Evans to contact Titanic to tell them that the Californian was stopped in the ice. Evans went to bed without accomplishing that task, or informing Lord that he had failed to carry out the order.
I would also argue that the message should have been sent as an MSG, which would have forced Phillips to suspend communications with Cape Race long enough to receive and acknowledge the ice message. Lord should have directed that the message be sent as an MSG, but a Marconi operator with sufficient initiative had enough authority from the direction given by Lord to format the message as an MSG. Evidently, Evans didn't even consider the possibility...after stepping on the MGY-VCE conversation, Evans simply went to bed. For failing to carry out his Master's orders, I find Evans wholly at fault for not delivering Lord's warning to Titanic.
That does not mean, however, that I find Evans at fault for what happened thereafter. We have no idea how the message would have been acted upon had it reached
Captain Smith. Would it have forced a change in the captain's night orders? We cannot know.
Parks