Denis Jenkinson
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Denis S. Jenkinson or Jenks (1921-1997) was a journalist deeply involved in motorsports. As a reporter of the UK-based Motor Sport magazine, he covered Formula One and other races all over Europe.
DSJ loved to race Porsche cars in his own right and coined the term wischening (pronounced as if in German) for the manner in which one may corner successfully in a Porsche 356. He served as passenger for world champion motorcycle outfit racer Eric Oliver. Most famously he was navigator for Stirling Moss during the 1955 Mille Miglia. His book "The Racing Driver" was based on his experience as navigator and is a true classic worthy of any motorsports literature collection. His "pacenotes" while navigating with Stirling Moss were among the first leading up to today's use of pacenotes in rallying. He went on to write several other motorsports books about Porsche, Frazer Nash, the Jaguar E-type, Juan Manuel Fangio, the Schlumpf Collection and a particular Maserati.
Jenkinson also developed the classification of a driver's effort into "tenths". 10/10ths being the highest, attained by only a few drivers in history.