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Comment by linschn | Hacker News Reader

The French ballistic submarines do work as described (but the attack submarines don't).

Nobody inside but the captain and the second in command know where they are.

Source : was in the French navy 2005-2007. I got to see them leave and enter through the straight near Brest. They do it surfaced as apparently the nuclear drive is hot enough to be detectable in the straight, so there is no point on doing it underwater. Take this last tidbit with a grain of salt because the sailor that told me was not a submariner himself.

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Couple things - they're surfaced in the straight near Brest not because of the reactor, but because it's too shallow to operate. For example, US East-coast submarines have to transit for hours on the surface to get to the dive point because of the continental shelf. On the US West coast (Hawaii, San Diego), they can pretty much dive shortly after leaving port.

More people than the Commanding Officer and Executive Officer would know their position, though. Whoever is the French equivalent of Officer of the Deck and the on-duty navigator would need to know their position. But yeah, there are times/situations where the position of the boat is MUCH more closely held - and that may be all the time on French ballistic missile submarines.

Interesting related note about Brest (which I bet you know, but throwing it in for the benefit of the thread): in WW2, once our anti-submarine capability got up to speed, transiting the continental shelf to or from Brest was one of the most dangerous times for a u-boat. Diesel subs were really only mobile on the surface, and were easily spotted from the air. Over the shallow continental shelf there wasn’t enough depth to escape once spotted.

>More people than the Commanding Officer and Executive Officer would know their position, though. Whoever is the French equivalent of Officer of the Deck and the on-duty navigator would need to know their position

Was gonna say, how the fuck does your navigator work without knowing where he is?

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