Know your Nautical terminology
burthen
The Builder's Old Measurement, expressed in "tons bm" or "tons BOM", a volumetric measurement of cubic cargo capacity, not of weight. This is the tonnage of a ship, based on the number of tuns of wine that it could carry in its holds. One 252-gallon tun of wine takes up approximately 100 cubic feet, and weighs 2,240 lbs (1 long ton, or Imperial ton).
Note: a ton = 2,000 pounds. A tonne = 1,000 kilograms
Not to be confused with a tunny or USS Tunny (SSN-682). 
WWG1WGA
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)