Thanks, however I expect that your document is not based on the Internatonal Tonnage Certificate and related calculation, since the British Registry does not demand this when the ship is less than 24m. Therefore your Tonnage is based on the simple approximate formula:
length x width x debth x 0.16 = tonnage
Rhumb Runner was also British, however as the Irish also the Danish Registry is very demanding above 15m.
Otherwise I am very interesser in the document if it includes the relevant volumens used for the detailleddet calculation.
Jeppe , email: jej at byg.dtu.dk