"Increasingly complex external environment and our rather precarious internal dynamics have created a myriad of security challenges," Kayani said addressing the 98th Midshipmen Commissioning term and 7th SSC Officers class at Pakistan Naval Academy here.
"Today, we are pitched against an amorphous enemy when the conventional threat has also grown manifold," he said without elaborating.
Kayani said that the country was passing through a very critical phase of its history.
"This spectrum of threats can be defeated through collective national efforts in which the armed forces indeed have a pivotal role to play in harmony with other instruments of the state," he was quoted as saying by state-run APP news agency.
Kayani added that under the prevailing scenario, a potent and modern navy was indispensable to thwart the challenges to the country's sovereignty in the maritime domain.