A 2,017-ton German submarine appeared off the northern tip of Scotland during a recent military exercise, giving British commandos a departure point to reach shore by inflatable boat, ascend rocky cliff faces, and direct the guns of a 401-foot Portuguese frigate at targets inland. The drill illustrated how allied forces plan and execute covert landings from submarines in challenging coastal zones.

The exercise brought together multiple allied nations, combining submarine operations with shore-based strike coordination in a high-pressure drill setting. Scenarios like this are growing in number as NATO focuses on submarine-launched landing operations.

Separately, the Australian Naval Institute raised concerns about vulnerable procurement networks 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 standing up its submarine capability.