This November 2005 issue of Submarine Telecoms Forum marks the fourth anniversary of the publication. The theme for this edition is 'Defense & Non-traditional Cable Systems,' offering insights into the evolving landscape of submarine cable systems beyond traditional commercial applications. Despite the challenges faced since the 'build it and they will come' era, the industry has seen significant improvements. The magazine continues to uphold its founding principles of providing a diverse range of ideas and issues, while aiming to incite, entertain, and provoke thought in a positive manner. This issue delves into the complementary and tangential markets of submarine cable systems, reflecting on the progress and future potential of these technologies.