candishtowers Posted August 4, 2023 Share Posted August 4, 2023 Reading the article “ Moving the Goods” in “The Collector” recently there is a picture of a train near Durham. Nothing special in that, however, the engine has just passed under a semaphore signal with home and distant arms and between them is what looks like a subsidiary or calling on arm. All are in the “off” position.i have not seen such a signal before and so I am questioning what was the meaning of the subsidiary signal when the driver would have taken the main line signals as his authority to proceed? Link to comment Share on other sites More sharing options...
Going Spare Posted August 5, 2023 Share Posted August 5, 2023 I think you will find a partial explanation in the railsigns.uk website under Section 4 "Subsidiary Signals", the first two paragraphs and illustration 4.2 which is applicable to the NER. As I interpret it, such a signal was used in isolation when there may have been a minor justification (e.g. proceeding in to a siding) for calling-on past the main signal but the subsidiary calling-on arm had to be pulled off before the main arm(s) could also be cleared for the main line route. Link to comment Share on other sites More sharing options...
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