A 2,017-ton German submarine emerged off the northern tip of Scotland during a recent military exercise, giving British commandos a staging platform to reach shore by inflatable boat, scale cliffs, and direct the guns of a 401-foot Portuguese frigate at targets inland. The drill demonstrated how allied forces coordinate covert landings from submarines in difficult shoreline environments.

The exercise brought together a mix of allied military units, combining submarine operations with overland commando movements in a live exercise environment. Scenarios like this are becoming more frequent as NATO focuses on submarine-launched landing operations.

Separately, the Australian Naval Institute highlighted problems about fragile supply chains underpinning nuclear submarine programs, a warning that adds pressure to long-term procurement planning for Australia's future submarine fleet. Analysts say consistent supplier availability will be essential as Australia works toward fielding nuclear-powered submarines.