The 15th issue of SubTel Forum, published in July 2004, explores the theme of tenacity within the submarine telecommunications industry. Drawing inspiration from the resilience and determination of Lance Armstrong during the Tour de France, this edition emphasizes the importance of perseverance in navigating the volatile market conditions of the telecom sector. Key articles include an industry survey, insights into spatial data management, and strategies for successful partnerships. The issue also features a look back at previous articles, a global map of submarine cable systems, and a diary of upcoming events, providing a comprehensive overview of the current state and future prospects of the industry.