Builder's Old Measurement

Builder's Old Measurement (BOM or bm) is the method used in England from approximately 1650 to 1849 for calculating the cargo capacity of a ship. It is a volumetric measurement of cubic capacity. It estimated the tonnage of a ship based on length and maximum beam. It is expressed in "tons burden" (Early Modern English:burthen, Middle English: byrthen ), and abbreviated "tons bm".

单词	Ton burden
释义	Ton burden 原声例句国富论（五） This duty is extended to the sale of all ships and vessels of more than two tons burden, whether decked or undecked. 此税适用于所有载重量超过 2 吨的船舶的销售，无论是有甲板的还是无甲板的。英语百科 Builder's Old Measurement Builder's Old Measurement (BOM or bm) is the method used in England from approximately 1650 to 1849 for calculating the cargo capacity of a ship. It is a volumetric measurement of cubic capacity. It estimated the tonnage of a ship based on length and maximum beam. It is expressed in "tons burden" (Early Modern English:burthen, Middle English: byrthen ), and abbreviated "tons bm".
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Ton burden

Builder's Old Measurement