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About Scamp

silhouette of USS Scamp
Silhouette of USS Scamp
Ship's Characteristics
Class and typeSkipjack-class Nuclear Fast Attack Submarine
Displacement2,830 long tons (2,880 t) surfaced
3,500 long tons (3,600 t) submerged
Length251 ft 8 in (76.71 m)
Beam32 ft (9.8 m)
Draft (Surfaced)25 ft (7.62 m)
Speed31 knots (36 mph; 57 km/h)
Diving Depth> 400 Feet (122 m)
Crew Complement8 officers & 85 enlisted
1 × S5W reactor
2 × Westinghouse steam turbines, 15,000 shp (11 MW)
1 shaft w/5-Blade Screw (Commissioning)
              w/7-Blade Screw (Retrofit)
Auxiliary Propulsion Motor (APM)
Sonar Systems
BQR-12 Active Sonar
BQR-2 Passive Sonar
BQS-4 (Modified) Active/Passive
AN/WLR-9 Acoustic Intercept Active Sonar
Towed Array (Hard Mount)
AN/UQN-1 Fathometer
Combat Electronic Systems
Radar: AN/BPS-13
Electronic Warfare: AN/WLR-6
Fire Control: MK-101 Torpedo FCS
IFF: MK-12 Transponder
Electronic Navigation
Magnavox 702 Satellite Navigation Set
Omega VLF Radio Navigation Set
LORAN A Radio Navigation Set
Masts and Antennas
No. 1 Periscope: Type 2F
No. 2 Periscope: Type 15B
AN/BPS-13 Radar Antenna
AT-317BRR VLF Antenna
AN/BRA-9 HF Antenna
AN/BRA-19 Multifunction Antenna
AN/BRD-6B RDF Antenna
Snorkel Mast
OE-176 Floating Wire Antenna
6 × 21 in (530 mm) torpedo tubes forward
MK-16 Torpedo
MK-37 Torpedo
MK-48 Torpedo
Forward and Aft Signal Flare Launchers
USS Scamp Interior Line Drawing
Line Drawing of USS Scamp Showing Interior Spaces
  1. Free-Flood Space with Upper and Lower hydrophones, Separated by Torpedo Tubes
    • Anchor with Anchor handling Equipment Lower Space
  2. Bow Compartment
    • Upper-Level: Crews Berthing (“Hanging Gardens”) and Supply Office
    • Torpedo Room
  3. Ops Compartment
    • Upper-Level: Control Room, Radio Room, Sonar Room, Yeoman’s Office
    • Mid-Level: Crews Mess and Wardroom
    • Lower-Level: Crew’s Berthing
    • Battery and Auxiliary Trim Tanks
  4. Reactor Compartment
  5. Aux Machinery Space, Upper and Lower Levels
    • Lower-Level: Emergency Diesel Generator
  6. Engine Room, Upper and Lower Levels
    • Upper-Level: Maneuvering with Reactor Control Space
Scheme of Pressure Hull and Outer Hull
Scheme of Pressure Hull and Outer Hull
  1. Pressure Hull
  2. Outer Hull

The area between the pressure hull and outer hull was used for main ballast tanks and free-flood spaces. The free-flood spaces housed high-pressure air flasks and other equipment that could be exposed to sea pressure. The boat’s mushroom anchor and chain was housed in the forward free-flood area.

Close-up of Scamp's Sail with Masts
Detail of Scamp’s Sail with Masts

Close-up view of the Scamp’s Sail, with retractable masts and antennas. The two periscopes, radar mast, and ESM mast extended into the pressure hull. The Radio Direction Finder (RDF) antenna is hidden by the radar mast in this view. The “turtleback” (hump behind the sail) housed the exhaust piping from the emergency diesel located in the lower-level Aux Machinery Space.

The Skipjack-class subs were unique in that there were doors on each side of the Sail giving access to the Fairwater Planes. Main access into the boats were from a fold-up accommodation ladder stored inside the mid-level area of the sail. In-port this ladder was rigged to the end of either fairwater plane and extended to the pier. There was also a lower access door on the sail at deck level, called the “Doghouse,” with an interior ladder up to the mid-level truck access. This trunk and ladder were used to access the weather deck while underway. The forward and aft weather deck safety tracks both terminated at the Doghouse door.