Back to the birds

Off to the East end of the island for some coastal scenery and it was full of both people - bad - and Bertholet's Pipits - good.
Not the most exciting bird in the world but as it only occurs on Madeira and the Canaries, it is always worth as look. The other bonus is that it is the only species of pipit here so identification is quite easy!
A quiz in the evening at which we were particularly useless - when I say we I refer to Tricia and myself. 
"12S on the N1PC" - what did it mean?