yd yard
mile 5280 feet
mi mile
-nautical 1.151 # For `nautical mile'
+#nautical 1.151 # For `nautical mile'
+nautical 1.150779447892
+statute 1
+# pilots need this :)
+nm 1 nautical mile
+sm 1 statute mile
parsec 1.91615e13 mi
+#parsec 3.08568025e16 m # better?
# light year will be implied by `year' and `light' below
fathom 6 ft
cable 120 fathoms
quarter 5 cwts
longton 20 cwt
#ton longton # use shortton my default Tim Riker <Tim@Rikers.org>
-ton shortton # the american ton, see metriton and longton
short 100|112 # Convert long tons, cwts, and quarters to short.
-shortton short ton
+shortton short longton
+ton short longton # the american ton, see metriton and longton
stone 14 lb
cental 100 lb
wey 252 lb