Life as a submariner is not always plain sailing as he can spend weeks or months at sea, including below the ocean surface without any natural light.

Crew members onboard a submarine have much to endure, cut off from normal life onshore for a long period of time and have to accept cramped conditions and above all, they face the daily dangers of sea and weather.

Royal Malaysian Navy (RMN) Officer Capt Khairulnizam Said, 46, who now serves the Submarine Command Headquarters operations...