Ishihara Colour Vision 24 or 38?

Home › Forums › Rail Standards › Ishihara Colour Vision 24 or 38?

Viewing 1 reply thread
  • Author
    Posts
    • May 3, 2023 at 1:56 pm #378
      marooms
      Participant

      Dear ALl,

      Who is using 24 plates and who is using 38 plates. Could I have a show of hands?

      Reason: Network Rail PTS standard states 38 plate should be used.

      Thanks,

      Mark

    • August 11, 2025 at 9:59 am #485
      marooms
      Participant

      Network rail have issued permission to use 24 plate and permit 2 errors from the first 13 plates. It is permitted to fail 3 plates from the first 17 plates of the 38 plate edition.

  • Author
    Posts
Viewing 1 reply thread
  • You must be logged in to reply to this topic.