The difficulty in keeping Britain's hunter-killer submarines available for operations has once more left the Royal Navy ...

None of the Royal Navy’s attack submarines are currently at sea. A fleet of nuclear-powered hunter-killers all tied up ...

The Spanish Navy has taken another major step in strengthening its undersea warfare capabilities.

All five Astute-class submarines are in port. See how this maintenance crisis threatens UK undersea security and internet cables.

Britain’s Royal Navy is facing a deeply uncomfortable readiness problem at sea. Reports say all five of its Astute-class ...

Russian forces strike a US attack submarine at sea ...

This U.S. Navy submarine is returning to service nearly five years after an infamous accident at sea. Let's hope the rest of its years pass without incident.

As the Royal Navy is now demonstrating, there is no way an enemy can hear your submarines if they are all in port. This week, however, it became apparent that none of the five “operational” boats ...

An Iranian Tareq-class submarine at sea - Omid Vahabzadeh/Wikimedia Commons/CC BY 4.0 After the United States and Israel attacked Iran in late February 2026, it became increasingly important to ...

The key differences explained based on roles, weapons, and missions.

China’s new sailless submarine breaks with tradition. See why this low-profile design is a major leap for undersea stealth ...

A multibillion-dollar submarine deal between India and Germany reflects New Delhi’s push for military self-reliance — and Berlin’s growing interest in the Indo-Pacific.