I have been looking over the displacement data for the Amel 54 and I notice there some discrepancies between some documents, I myself am now uncertain.  Have various figures and conversions been confused between imperial and US tons?

Anyway, what are the correct figures for displacement of the Amel 54 please?  Light and loaded.
What is the ballast weight? 
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David Crisp
SV Wilna Grace
Amel 54 #58

Hello, the weight of my 54 with the water and diesel tanks half full has been measured at 21,000 kgs.

Dominique
Irko A54#16