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Norfolk (1798 Sloop)
The Colonial sloop ''Norfolk'' was built on Norfolk Island in 1798 of Araucaria heterophylla, Norfolk Island Pine. She was wrecked in 1800. :"The necessity of a vessel to keep up a more frequent intercourse with Norfolk Island, ...having been much felt by the want of various stores ...occasioned Captain Townson, the Commanding officer, to construct a small decked boat, sloop rigged, in which he sent His letters to this port..." Cumpston describes ''Norfolk'' as, “A decked longboat built at Norfolk I[sland].” John Hunter (Royal Navy officer), Governor Hunter quickly put ''Norfolk'' under the command of Matthew Flinders, the Sailing Master Peter Hibbs (seaman formerly on the "Sirius") Norfolk was to be used as a survey vessel. In 1798-99 ''Norfolk'' was used by Flinders and George Bass, Bass to circumnavigate Tasmania – proving the existence of Bass Strait. Flinders also took ''Norfolk'' north to chart James Cook, Cook's ''Morton's Bay'' (now Moreton Bay) and Hervey's Bay ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Builder's Old Measurement
Builder's Old Measurement (BOM, bm, OM, and o.m.) 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" ( en-em , burthen , enm , byrthen ), and abbreviated "tons bm". The formula is: : \text = \frac where: * ''Length'' is the length, in feet, from the stem to the sternpost; * '' Beam'' is the maximum beam, in feet. The Builder's Old Measurement formula remained in effect until the advent of steam propulsion. Steamships required a different method of estimating tonnage, because the ratio of length to beam was larger and a significant volume of internal space was used for boilers and machinery. In 1849, the Moorsom System was created in the United Kingdom. The Moorsom system calculates the cargo-carrying capacity in cubic feet, another method of volumetric measurem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |