P Class
SS.172
 

Group 1

Boats in class  2 Units - SS.172 Porpoise   SS.173 Pike
Normal displacement surfaced  1.310t
Normal displacement submerged  1.960t
Machinery  2 x Winton or Fairbanks Morse Diesel
2 x Elliot or General Electric
Maximum power Surfaced/Submerged  4.300hp/2.085-2.336hp
Speed Surfaced/Submerged  19 knots/8 knots
Armament  1 x 76mm L/50 or 102mm L/50 Gun
2 x 12,7mm AA MG
2 x 0.3in MG
Torpedeo Tubes  6 x 533mm/16 - 18 Torpedoes
Length  91,7m
Beam  7,6m
Height  4m
Complement  55
Year of construction  1933-1935
Fate  
Builder  Portsmouth Navy Yard

Group 2

Boats in class  2 Units - SS.174 Shark   SS.175 Tarpon
Normal displacement surfaced  1.315t
Normal displacement submerged  1.968t
Machinery  2 x Winton or Fairbanks Morse Diesel
2 x Elliot or General Electric
Maximum power Surfaced/Submerged  4.300hp/2.085-2.336hp
Speed Surfaced/Submerged  19 knots/8 knots
Armament  1 x 76mm L/50 or 102mm L/50 Gun
2 x 12,7mm AA MG
2 x 0.3in MG
Torpedeo Tubes  6 x 533mm/16 -18 Torpedoes
Length  90,8m
Beam  7,6m
Height  4,2m
Complement  55
Year of construction  1933-1936
Fate  
Builder Electric Boat Groton

Group 3

Boats in class  6 Units - SS.176 Perch   SS.177 Pickerel   SS.178 Permit   SS.179 Plunger   SS.180 Pollack   SS.181 Pompano
Normal displacement surfaced  1.330t
Normal displacement submerged  2.005t
Machinery  2 x Winton or Fairbanks Morse Diesel
2 x Elliot or General Electric
Maximum power Surfaced/Submerged  4.300hp/2.085-2.336hp
Speed Surfaced/Submerged  19 knots/8 knots
Armament  1 x 76mm L/50 or 102mm L/50 Gun
2 x 12,7mm AA MG
2 x 0.3in MG
Torpedeo Tubes  6 x 533mm/16 -18 Torpedoes
Length  91,6m
Beam  7,6m
Height  4,2m
Complement  55
Year of construction  1935-1937
Fate  
Builder SS.176 Perch   SS.177 Pickerel   SS.178 Permit - Electric Boat Groton 1935-1937
SS.179 Plunger   SS.180 Pollack   - Portsmouth Navy Yard 1935-1937
SS.181 Pompano - Mare Island Navy Yard 1936-1937