1) It's surprising or kind of amusing that such a huge and complex submarine uses plain old Raytheon / Raymarine radar when operating in harbor, etc. as if were just a little sailboat. But whatever works and is effective! I wonder how it has to be dismantled and put up, taken down each time? Perhaps it's mostly for being visible to other ships/monitoring stations? I recalled hearing that a sub is never in such places without accompanying surface fleet/tugs/etc anyway.
2) Looking at the periscope mast, the amount of technological sophistication in that thing must be incredible. The amount of communications (radio, laser, metallurgy, stealth coatings, etc) gadgetry there I'm sure would boggle the mind. Yet it all goes to the theme -- here is a boat worth many billions of $ and the pinnacle of US military sophistication, being put into the hands and trust of mostly 20-something young sailors, and mostly without incident. Truly amazing that we're able to do that.