In maritime transport, it is difficult to absolutely list the top 20 cargoes with the least shipping volume. Because the shipping volume of cargoes is affected by many factors such as the global economic situation, industrial development, and trade policies, and the data in different years and periods will vary. However, generally speaking, some niche, special - purpose, high - value and small - volume/weight cargoes, as well as some cargoes with seasonal and regional demands, have a relatively small maritime shipping volume. The following are some examples of cargoes with relatively small shipping volume and the relevant table:
High - end Jewelry and Precious Metals: Such as diamonds, rubies, gold, etc. These cargoes are of extremely high value, but due to their small volume and light weight, and they are usually transported by special security transportation methods, the maritime shipping volume is extremely small compared with the overall maritime cargoes.
Precision Instruments: Such as high - end microscopes, precision components for aerospace, etc. These instruments are complex to manufacture and expensive, with a relatively small number of demands. They have extremely high requirements for the transportation environment and safety, and are mostly transported by air or through special - customized transportation, so the proportion of maritime transport is very low.
Biological Samples and Pharmaceutical R & D Reagents: Including some rare biological tissue samples, specific gene reagents, etc., which are used for scientific research and pharmaceutical R & D. They are small in quantity and require strict temperature - control and other transportation conditions, so the maritime shipping volume is not large.
Artworks and Antiques: Such as oil paintings, ancient ceramics, etc. They have extremely high cultural and economic values, require special protection during transportation, and have a limited transportation volume. Usually, they are accompanied by strict security measures, and maritime transport is not the main transportation method.
Radioactive Isotopes: Mainly used in special fields such as medical radiotherapy and industrial inspection. They are radioactive, have extremely strict transportation requirements, and are relatively small in quantity, so the maritime shipping volume is not high.
Some Rare Ores: Such as beryllium, lithium and other rare metal ores. Although there is a demand in the new energy and other fields, due to the limitations of reserves and mining volume, as well as the relatively concentrated origin, the maritime shipping volume is smaller than that of other bulk ores.
Custom - made Large - scale Sculptures: Mostly customized for specific places, with a small number, and require special packaging and loading and unloading equipment for transportation, so the frequency of maritime transport is low.
High - end Leather Products: Such as handicrafts made of some rare leathers, high - end leather goods, etc. With a limited production volume, they are mainly aimed at the high - end consumer market, and the shipping volume is not large.
Some Spices: Such as some niche and rare spices from specific regions, such as some special vanilla varieties in Madagascar. Although they are of high value, their demand is relatively small, and the maritime shipping volume is small.
Rare Ancient Books: As precious documentary materials, they are rare in quantity and mainly circulate among libraries, museums and other institutions. They need special protection during transportation, and the maritime shipping volume is extremely small.
Small Satellite Components: With the development of the aerospace industry, there is a certain demand, but due to their high technical content and limited production quantity, and high requirements for transportation accuracy and environment, the maritime shipping volume is not large.
Some Special - purpose Timber: Such as some endangered protected special - purpose timbers, subject to international trade control, the legal transportation volume is limited, and the resources are scarce, so the maritime shipping volume is small.
High - end Watches: Although there is a certain scale of market demand, due to the small volume and high value of a single product, air transport, which is faster and safer, is usually adopted, and the proportion of maritime transport volume is small.
High - Purity Chemical Reagents: Used in high - end fields such as semiconductor manufacturing, with extremely high requirements for purity, relatively small dosage, and small shipping volume.
Live Rare Animals and Plants: Such as some endangered ornamental fish, rare flowers, etc. Subject to strict import and export control and transportation conditions, the maritime shipping volume is extremely small.
Aerospace Fuels: Such as liquid oxygen, liquid hydrogen, etc. Although there is a demand in the aerospace field, due to their special physical properties and transportation safety requirements, they are generally not transported in large quantities by sea, and the shipping volume is limited.
Some High - end Electronic Product Chips: Such as some newly - developed high - end artificial intelligence chips with limited production quantity, which are of high value and small in volume, and mostly use fast - transportation methods, so the proportion of maritime transport is low.
High - end Replicas of Archaeological Relics: Used for museum exhibitions, etc., well - made but limited in quantity, with low transportation demand.
Specially - customized Textile Fabrics: Such as some special - fiber fabrics customized for high - end fashion, with a small production quantity, and the corresponding shipping volume is also small.
Small Astronomical Observation Equipment: Such as some professional small - scale telescopes, etc., which are aimed at scientific research institutions or high - end enthusiasts, with a limited number of demands, and the maritime shipping volume is not large.
