Aboard a US boomer at sea... with camera...
Try to get hold of the Discovery Channel documentary series "Submarines sharks of steel" It was shot by a small Australian crew with an extraordinary range of interviews and access. When they went to Washington state to film the US Trident submarines a Commander invited them aboard and, impressed with their research, then took them to sea for three weeks while doing a work up and testing after a refit and maintenance. They filmed the entire thing including interviews with the commander and XO During this exercise they received an E.A.M or emergency action message and the crew then ran through the sequence to practice a launch which was filmed in its entirety from end to end! Extraordinary! This is in the days when Commanders of US Trident submarines had absolute control and discretion as designed by Admiral Rickover, the founder of the US nuclear Navy. I believe the launch sequence shown in the movie "Crimson Tide" was derived from this documentary. Naturally US naval command objected strongly to the sequence being published in the documentary but since the crew had permission from the commander they decided to include it anyway, with a couple of "blurred bits" much to the Navy's annoyance. The whole 4 part series is worth a watch but the Trident sequence is the highlight I think. I know the then line-producer who was with the crew (director/camera, soundo, producer, 3 in total). Steve said that they effectively disappeared for 3 weeks as no one ashore, even the navy, knew they were aboard. They later went to Russia and got a tour and interviews aboard a Russian boomer, this being just post Cold War and prior to the rise of V Putin. Check it out...