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Maarten, you wrote: I think the English speaking part of the world could take 
an example from that regarding the SI units.

Are you sure that's all you want to change?  The online conversion utility I 
use (http://www.onlineconversion.com/) states that they have 5000 units and 
can perform up to 50,000 conversions.  Don't we want to resolve those as 
well?  A grand unified "unit"?

And please don't blame all the English speaking world!  Among all the 
countries who use English as language, we have no agreement on units 
either!!!

The agony I encounter as an American overseas with hardware could fill books.  
I have spent time in Korea searching for 1/4-20 hardware.  That's one quarter 
of an inch in diameter with 20 threads per inch.  I have been laughed at in 
the UK when I asked for 1/4-28 (that's the fine thread) hardware.  Cried in 
Japan when a double aught-256 piece of hardware disappeared.  Here in the 
States, we stock both kinds of hardware, metric and SAE.  Supply companies 
really love this as it represents double overhead.

How about the drawings with the units in the metric system?  My machinists 
can't understand them, while my clients are uncomfortable in the inch system. 
 I tell my clients this is one way to be sure that you don't make my parts 
outside of the contract.  Your machinists won't be able to understand them 
and have then laughed when they tried.

When it comes to angular measurements, we on the NavList use the Babylonian 
system of degrees, minutes and seconds. What happened to the "thirds" is see 
referenced in older navigation texts?  There are other systems of angular 
measurement, radians spring immediately to mind.  How about grads?

Units are arbitrary for the most part.  Established by convention, not by nature.

Best Regards
Brad








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