What is the NOT a specialisation of Comprehensive Ports?

Large volumes of Passenger Traffic.

Generally, ports are classified according to the types of traffic which they handle. Types of port according to cargo handled:
(i) Industrial Ports: These ports specialise in bulk cargo-like grain, sugar, ore, oil, chemicals and similar materials.
(ii) Commercial Ports: These ports handle general cargo-packaged products and manufactured good. These ports also handle passenger traffic.
(iii) Comprehensive Ports: Such ports handle bulk and general cargo in large volumes. Most of the world’s great ports are classified as comprehensive ports.