With a crew of 38, the submarine NRP Tridente left the Lisbon Naval Base on Tuesday, April 14, for a NATO mission lasting approximately two and a half months. During this deployment, the submarine will join the Atlantic Alliance's 'Brilliant Shield' operation and participate in 'Dynamic Mongoose', one of NATO's most significant anti-submarine warfare exercises. The mission also includes support for the Royal Navy's Fleet Operational Standards and Training (FOST) for two weeks. Admiral Jorge Nobre de Sousa, Chief of the Naval Staff, highlighted the submarine's role in ensuring security and surveillance for the Alliance.
Submarine NRP Tridente departs for a two-and-a-half-month international NATO mission
Tuesday, 14 April 2026RSS
Context & Explainers
The North Atlantic Treaty Organization (Organização do Tratado do Atlântico Norte or OTAN) is a 32-member alliance facing pressure to intervene in the Strait of Hormuz to secure maritime routes. Disagreement among members regarding this military involvement has led to warnings about the organization's future stability. Portugal has been a member since NATO's founding in 1949 and hosts a major Joint Force Command in Oeiras.
