I've asked the very same question and never received an official answer to that. The Confuser says that 'electronic calculators are not allowed to be used during the examination so a good working knowledge of the CRP Computer is essential, particularly as time is at a premium for most candidates during the navigation examination'. That said, talking with pilots it appears to vary from school to school.
Previous to the exam I used non-permanent water-soluble pens however during the exam the chart was a lot older, a much earlier edition than the one I'd trained on so I was required to use a soft lead pencil on that one, the surface was tending towards matt and certainly not as 'glossy' as later charts.
Last edited by Mike744; 4th May 2010 at 10:57.
Reason: add text