Mr Frumpy!
Rig for Red: Also rig for romantic or rig for Johnny Mathis (this last one is no longer in use I’m sure, as it’s way too dated). Turn the control center lights to red in preparation for PD. Red light making it easier for your eyes to adjust to darkness when you rigged for black prior to heading up to PD. Back in the late 1980s, on my first boat, we all smoked, so you would constantly hear calls of “bright light in control,” as people lit cigarettes, always careful to cup the lighter in your hands to minimize the glare in the blackness of control. Sometimes, instead, we would send the lee helm out to nav center to light 7 or 8 cigarettes and bring them back to pass around to their intended recipients.
https://foxtrotalpha.jalopnik.com/all-the-wacky-submarine-terms-you-never-knew-you-wanted-1708297555
PD
PD: Periscope depth. The depth at which you can see out of your scope while still remaining submerged. As a ship’s control party guy, you would often spend hours here, uggghhhh. Maintaining your depth to within a couple of feet in a place. You would not be happy being discovered while a sea state 4 or 5 is tearing you a new one is pretty much the core of what we do. At this depth, you watch stuff, shoot trash, ventilate the ship and perform other housekeeping sort of tasks. Note that when “on station,” that is, watching stuff in a place you don’t want to be discovered, is not when you do the housekeeping. As a Helmsman/Planesman for my watch, for battlestations, any other special thing, and then later as Chief of the Watch, Diving Officer, and Pilot/Co-Pilot (Virginia-class at the end of my career), I spent a few thousand hours at PD.