A 2,017-ton German submarine surfaced off the northern tip of Scotland during a recent military exercise, giving British commandos a launch 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 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 direct cliff assaults in a live exercise environment. Scenarios like this are increasingly common as NATO focuses on submarine-launched landing operations.

Separately, the Australian Naval Institute highlighted problems 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 a deciding factor as Australia works toward fielding nuclear-powered submarines.