During last days I had some fun learning different terms used in the shipping industry while investigating some possible investments. Let me share some of these examples:
“Panamax”: this is a term for the size limits for ships traveling through the Panama Canal.
“Panamax is determined principally by the dimensions of the canal’s lock chambers, each of which is 110 ft (33.53 m) wide by 1,050 ft (320.04 m) long, and 85 ft (25.91 m) deep. The usable length of each lock chamber is 1,000 ft (304.8 m). The available water depth in the lock chambers varies, but the shallowest depth is at the south sill of the Pedro Miguel Locks and is 41.2 ft (12.56 m) at a Miraflores Lake level of 54 ft 6 in (16.61 m). The height of the Bridge of the Americas at Balboa is the limiting factor on a vessel’s overall height.”
(Did you ever have such an idea of the size of the Panama Canal?)
The same applies to the term “Suezmax”.
Another curious term is “Capesize“… which meaning by now you may already guess: “Capesize ships are cargo ships originally too large to transit the Suez Canal (i.e., larger than both Panamax and Suezmax vessels). To travel between oceans, such vessels used to have to pass either the Cape of Good Hope or Cape Horn. [I especially liked this last clarification] In effect Capesize reads as “unlimited”.” (Sure, once you have to travel around in the open ocean… you put the limit).
Lastly, “Deadweight tonnage”: this is “the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew.” It is curious that in the shipping industry this is also called “payload” according to the Wikipedia, while in the air cargo industry we refer by payload to just the weight of cargo / passengers…