External Link Conversion Calculator for Units of LENGTH (http://www.ex.ac.uk/cimt/dictunit/ccleng.htm)
... O 15 P 16 R 17 S 18 T 19 V 20 W 21 Y 22 Z A Roald Amundsen, (1872-1928), Norwegian, first at the South Pole, first to navigate the Northwest Passage ...