T3 tanker
Designs

Design & class
Propulsion
Power
Speed (max)
Length × beam × draft
Gross register tonnage
Tankage
T3-S-A1 tanker, Chiwawa-class oiler
2× steam turbine, single screw
7,700 shp (5,700 kW)
15 kn (28 km/h; 17 mph)
501 ft × 68 ft × 29.6 ft (152.7 m × 20.7 m × 9.0 m)
9,880
133,800 bbl (21,270 m3)
T3-S2-A1 tanker, Cimarron-class oiler (1939)
4× turbine, twin screws
13,500 shp (10,100 kW)
18 kn (33 km/h; 21 mph)
553 ft × 75 ft × 32 ft (168.6 m × 22.9 m × 9.8 m)
11,335
146,000 bbl (23,200 m3)
T3-S2-A3 tanker, Ashtabula-class
geared turbines, twin screws
30,400 shp (22,700 kW)
18.3 kn (33.9 km/h; 21.1 mph)
553 ft × 75 ft × 32 ft (168.6 m × 22.9 m × 9.8 m)
7,423
146,000 bbl (23,200 m3)
T3-S2-A3 "jumboized"
-
-
-
644 ft × 75 ft × 36 ft (196 m × 23 m × 11 m)
12,840
-
T3-S-AZ1 tanker
5-cylinder two-cycle oil engine, single screw
7,500 shp (5,600 kW)
15.5 kn (28.7 km/h; 17.8 mph)
547 ft × 70 ft (167 m × 21 m)
11,401
-
T3-S-B tanker
2× steam turbines, single screw
7,700 shp (5,700 kW)
14 kn (26 km/h; 16 mph)
515.9 ft × 70 ft (157.2 m × 21.3 m)
11,016
140,000 bbl (22,000 m3)

Question: How jumboized was the tanker T3-S2-A3?
Answer: T3-S2-A3 tanker was "jumboized" extending the length from 553 to 644 feet, consequently increasing the tonnage.