Ohio-Class submarine of US Navy (Photo Source: people.com.cn)

Ohio-Class submarine of US Navy (Photo Source: people.com.cn)

Borey-A Class submarine of Russian Navy (Photo Source: people.com.cn)

Vanguard class submarine of British Royal Navy (Photo Source: people.com.cn)

Typhoon class submarine of Russian Navy (Photo Source: people.com.cn)

Triomphant class submarine of French Navy (Photo Source: people.com.cn)

Delta class submarine of Russian Navy (Photo Source: people.com.cn)

Type 094 submarine of Chinese Navy (Photo Source: people.com.cn)

L'IndomptableS613 submarine of French Navy (Photo Source: people.com.cn)

Lafayette class submarine of US Navy (Photo Source: people.com.cn)

Resolution class submarine of British Royal Navy (Photo Source: people.com.cn)