A 2,017-ton German submarine surfaced off the northern tip of Scotland during a recent military exercise, giving British commandos a departure point to reach shore by inflatable boat, climb the coastline, and direct the guns of a 401-foot Portuguese frigate at targets inland. The drill demonstrated how allied forces carry out covert landings from submarines in contested coastal terrain.

The exercise brought together multiple allied nations, combining submarine operations with shore-based strike coordination in a realistic training scenario. Scenarios like this are growing in number as NATO focuses on combined arms coastal tactics.

Separately, the Australian Naval Institute raised concerns 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 reliable sourcing will be essential as Australia works toward fielding nuclear-powered submarines.