On December 25, 1943, USS Gurnard (SS 254) snuck into Tokyo Bay where the crew took a photo of Mount Fuji through the periscope. The crew then had Christmas dinner as the Imperial Japanese Navy patrolled above them. Submariners are a different breed.
Photo taken through the periscope of Mount Fuji (Fujiyama in Japanese) on Christmas Day 1943 from Gurnard (SS-254)submerged in Tokyo Bay. Very risky photography, given the proximity to major Imperial Japanese forces at that time.