Pronunciation: [tˈʌnɪd͡ʒ] (IPA) 
Tunnage is a term used to describe the carrying capacity of a ship. The spelling of this word can be confusing, as it is not phonetically spelled. The IPA phonetic transcription of 'tunnage' is /ˈtʌnɪdʒ/, which is derived from the French word 'tonnage.' The 'a' in the second syllable is silent, and the 'g' is pronounced as a soft 'j' sound. This helps to explain the spelling and pronunciation of this commonly used nautical term.
Tunnage refers to the measurement of the carrying capacity or the weight of goods that a vessel, such as a ship or a boat, is capable of carrying. It is primarily used in the shipping industry to determine the commercial capacity of a vessel and calculate freight rates.
In its original and more traditional sense, tunnage was a measure based on the tun, a large barrel used for storing and transporting liquids, such as wine or beer. It was initially used to calculate the amount of wine a ship could carry, but later evolved to encompass the weight-carrying capacity of vessels generally. Nowadays, tunnage is commonly expressed in terms of deadweight tonnage (DWT), which includes the total weight of cargo, fuel, supplies, and other equipment that a ship can transport safely.
The tunnage of a vessel is a vital factor for shipowners, cargo companies, and freight brokers as it serves as the basis for calculating freight charges, insurance premiums, and port fees. Additionally, it helps determine the maximum load a ship can bear without compromising its stability and safety.
The term "tunnage" can also be used in a broader context to refer to the overall weight or capacity of other modes of transportation, such as trucks or trains. However, its most common application remains within the maritime industry.
Same as tonnage-see ton.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "tunnage" originated from the Middle English term "tunnage" or "tonnage", which was derived from the Old French word "tonnage". This ultimately traces back to the Late Latin word "tonnaticum", meaning "a tax or duty on wine". The Latin word derived from the Late Latin term "tonna", referring to a large cask or barrel used for holding liquids, which in turn came from the Gaulish/Celtic word "tonna", meaning "a wine cask". Over time, "tunnage" evolved to denote the measurement or capacity of a ship's hold or the amount of cargo it can carry.
