This book delves into the audacious and groundbreaking expedition of using a submarine for polar exploration. The author, a seasoned explorer, recounts the genesis of this revolutionary idea, tracing it back to early discussions with fellow adventurers during a challenging Arctic sledge journey. He explores the potential of submarines to revolutionize polar research, enabling scientists to conduct in-depth studies of the ocean depths, currents, and marine life. The narrative unfolds against the backdrop of a rich history of polar exploration, highlighting the evolution of this ambitious concept. From the visionary ideas of Bishop John Wilkins in the 17th century to the pioneering efforts of modern-day explorers, the book showcases the enduring human fascination with conquering the Arctic's icy frontiers. The book delves into the technical challenges and scientific opportunities presented by under-ice exploration, discussing the design and capabilities of the specially equipped submarine, the Nautilus. It emphasizes the importance of meticulous planning and collaboration with experts from various fields to ensure the success of this unprecedented endeavor. Ultimately, this book offers a glimpse into the future of polar exploration, where submarines may unlock the secrets hidden beneath the Arctic ice, contributing to our understanding of Earth's climate, oceanography, and the delicate balance of life in these extreme environments.