This ship also is said to be able to engage in asymmetrical warfare. Apart from class definitions, there are names of Royal Yachts and their architecture. Some of which are,  In addition to these, we find many names of Ship classes in Purananuru and its application in both inland waters and open oceans. Some of them are,   In the tenure spanning the 700 years of its "documented" existence, the Chola Navy was involved in confrontations for probably 500 years. There were frequent skirmishes and many pitched battles. Not to mention long campaigns and expeditions. The 5th centuries of conflict between the Pandyas and Cholas for the control of the peninsula gave rise to many legends and folktales. Not to mention the heroes in both sides. The notable campaigns are below  The chola emperors gave a free hand to the admirals in recruiting and training of sailors, engineers, oarsmen and marines. There were no complicated tests and evaluation process. Any citizen or even non citizen could sign up for the naval service. But, one did not end up in the work of his choice. Preference were given to ex-servicemen, their sons and noblemen. But, this attitude changed in later days. And many class of soldiers / sailors distinguished themselves, irrespective of rank and class. The most ancient of ports used by Cholas was Poompuhar. Later on, they used many more ports and even built some new ones. Some of the famous ports are:   In addition to these sea ports there were many inland ports and dry dock connected by Rivers Kaveri and Thamarabarani which served commercial fleets and in times of war, to facilitate mass production, ships were built inland and ferried through the rivers to the Ocean. The fleets were normally named after the dead monarchs and god's name. The most distinguished ones were granted Royal prefixes like Theiva-sovereign's name-fleet name. During the reign of Rajaraja Chola I and Rajendra Chola I, there were 5 fleets, each catering to particular needs. The main fleet was home ported in Nagapatinam. The other fleets were home ported in Kadalur and a small fleet was also based in Kanchipuram. In addition to the main fleets of war ships, there were two fleets of logistics and transport ships to serve the needs of the army; involved in a bloody war in Ceylon and later in southeast Asia. In the later years these numbers increased drastically and a several fleets were created anew.