No You don't have the Tonnage record.. sorry...
March of 44 as you can plainly see. 456K... I would have broke a million..but alas SH3 would not allow it.
SH3+GWX3.0+SH3 Commander3.2
74% realism.. Have external view, map contacts, weapon officer asst and manual targeting is OFF.
And I will never tell my hunting grounds.. AND NO HARBOR RAIDING AT ALL! Open water only.
I can only say
...Be More Aggressive Herr Kaluen!! 
Actually had eels left but had to return to base due to CTD and game instability.