Generate a medium wide shot image of a seasoned submarine captain, perhaps with a serious, determined expression, intently focused within a high-tech, dimly lit control room. The captain is positioned among an array of glowing sonar screens displaying complex underwater topography and is either operating or observing a raised periscope. Through large, reinforced viewports, a mysterious deep-sea ocean vista is visible, showcasing faint light filtering through the water and the silhouettes of distant, intriguing marine life. The overall scene should convey a strong sense of deep-sea exploration, technological advancement, and quiet anticipation, with atmospheric blue and green light emanating from the instruments and the external view.