MAIN PARTICULARS  Oberon Class   Oxley & Otway   Odin Class   Parthian Class   Rainbow Class
                                                   Classes

Length overall                   269ft 8 in              275ft                      283ft 6in          289ft 2 in        287ft 2in
Beam                               27ft 11 1/2 in        27ft 7 5/8 in             29ft 10 3/4 in    29ft 10 3/4 in  29ft 11 in
Depth, pressure hull           16ft 8 5/8 in          16ft 7 1/2 in             16ft 11 7/8 in   16ft 11 3/4 in   16ft 11 7/8 in
Displacement,
  surface                          1598 tons              1636 tons                1781 tons        1760 tons        1763 tons
  submerged                     1831 tons              1872 tons                2038 tons         2040 tons        2030 tons
Diving depth                     500 feet                500 feet                  500 feet           500 feet          500 feet
No. of shafts                    2                          2                            2                     2                    2
Propellers                         Details unknown     Details unknown       3 blades,          3 blades,         3 blades,
                                                                                                6ft 5 in dia        6ft 5 in dia      6ft 9 in dia
Speed, surface:
  design                            15 knots                15.5 knots              17 to 17.5 knots 17 to 17.5 knots  17 to 17.5 knots 
  service                           13.75 knots           15.2 knots              17.5 knots         17.5 knots       17.5 knots
Speed, submerged:
  design                             9 knots                 9 knots                  9 knots              9 knots           9 knots 
  service                            7.5 knots              8.5 knots               8 knots              8.5 knots         8.75 knots 
Endurance, surface:
  design                             12 000 miles         14 000 miles          11 400 miles       11 400 miles     11 400 miles
                                        at 8 knots             at 8 knots              at 8 knots          at 8 knots         at 8 knots
  service                           6800 miles             8450 miles            11 400 miles      10 750 miles      10 900 miles 
                                       at 10 knots             at 10 knots           at 8 knots          at 8 knots          at 8 knots 
Endurance, submerged:
  design                            60 miles                 60 miles               60 miles            60 miles            60 miles
                                       at 4 knots               at 4 knots            at 4 knots          at 4 knots          at 4 knots
  service                          Details unknown      16 miles                8 miles             8.5 miles           8.8 miles
                                                                    at 9 knots             at 8 knots         at 8.5 knots       at 8.8 knots
                                                                                               52 miles           70 miles             60 miles
                                                                                               at 4 knots         at 4 knots          at 4 knots
Armament                         6 21-inch                6 21-inch              6 21-inch           6 21-inch           6 21-inch
                                       bow tubes               bow tubes             bow tubes         bow tubes          bow tubes
                                       2 21-inch                2 21-inch              2 21-inch           2 21-inch           2 21-inch
                                       stern tubes             stern tubes           stern tubes        stern tubes        stern tubes  
                                       (16 torpedoes          (16 torpedoes       (14 torpedoes    (14 torpedoes     (14 torpedoes
                                        carried)                   carried)                carried)            carried)              carried)
                                       1 4-inch gun            1 4-inch gun          1 4-inch gun      1 4-inch gun      1 4-inch gun
Complement:
  design                            53                          53                       53                   53                     53