USS Parche, from H.I.Sutton's site linked above:
I was about to laugh at the implausibility of this, landing gear on a 100-metre long nuclear submarine*? Side thrusters**? Totally unhydrodynamic protrusions all over***? Full-scale extra sonar on top of the rear hull, even though it's rendered ineffective whenever the propeller is operating...****?
...and then I realized it's all real and not a whiff 
*) Then I realized that due to buyoancy it won't have to support it's full weight and is useful if you're trying to stand still near the bottom in <300m deep water - does not even require the use of propeller
**) Useful for precise positioning eg. directly above an undersea cable
***) It probably won't be trying to reach record speeds and if it would have to hide from active sonars (which are rarely used except when wanting to scare an already detected sub/getting the final "fix" for firing solution) the mission has been compromised already
***) When it's standing still at the bottom the towed array cannot be deployed but the propeller is not interfering with a rear-facing sonar either. The spherical sonar at the front still can't see through the hull so this is needed for rearward "visibility", and putting the rear sonar on the top makes sense in this case as the potential attacker obviously cannot approach from below
Yep, some of the 'incidents' involving these boats would make the hairs on the back of your neck stand up if they weren't wet....
Seawolf had a horrible experience in the Sea of Okhotsk one time when a powerful storm came in whilst she was on the bottom. The boat was rocking on her 'skegs' (landing gear) and one of the divers nearly got trapped under one of them. Then it was discovered that the currents had washed sand over the skegs and the reactor cooling intakes had sucked it in, contaminating the system and threatening a shutdown. What's more, the skegs were stuck in the sand.
She was stuck on the bottom for two days while various remedies were tried. A violent maneuver to lift her off the seabed was out of the question if it risked her breaking the surface, because she would then almost certainly be detected and attacked. In the end, they had to cut the mushroom anchors to free her. As she came off the bottom, a cradle between the skegs that was intended to hold recovered missile parts partially broke free. As she left the area, they discovered that at anything over six knots the cradle banged against the hull, making an awful noise that would give their position away. Then they were detected by a Soviet surface ship, possibly an armed trawler, and she chased them for 24 hours, with the Seawolf unable to move at more than six knots or maneuver hard. In the end, the Soviet vessel just gave up and went away, for reasons that the sub crew couldn't fathom. It might just have been the whim of her captain.
When she got home and into dry dock, Seawolf looked like she'd been depth-charged, with dents all over her hull and damaged equipment hanging off...
