|Operators:||Société Maritime Shell France|
|In service:||1976 to 2003|
|Displacement:||77,300 tonnes light ship
630,962 tonnes full load
(Batillus and Bellamya) 
|Length:||LOA: 414.22 m (1,359.0 ft) LBP: 401.10 m (1,315.9 ft)|
|Beam:||63.01 m (206.7 ft)|
|Draft:||28.5 m (94 ft)|
|Depth:||35.92 m (117.8 ft)|
|Installed power:||64,800 bhp (48.3 MW)|
|Propulsion:||4 × Stal-Laval steam turbine engines
2 × propellers
|Speed:||16 kn (30 km/h; 18 mph)|
The Batillus-class supertanker was a class of tanker ships built in France at the end of the 1970s. Four such ships were built between 1976 and 1979—serving until the final one was scrapped in 2003. They were built in the Bassin C dock of the Chantiers de l'Atlantique shipyards at Saint Nazaire, France. Measured by gross tonnage, these were the largest ships of any type ever constructed.
While being the largest ships ever built by gross tonnage, the four Batillus class ships were the second largest ever constructed when measuring deadweight tonnage or length overall, behind only the supertanker Seawise Giant (renamed four times, including Knock Nevis), which existed from 1979 to 2009.
While there were minor differences between the four Batillus class ships, they all approached 275,000 tonnes gross (GT) tonnage, 555,000 tonnes deadweight (DWT) tonnage, and had a length overall of just over 414 metres (longer than all but a few of the tallest skyscrapers in the world).
Unlike Seawise Giant and most other ULCCs, the Batillus class vessels had twin screws, twin boilers of full size and power, and twin rudders. As a result, in an emergency they could more easily and safely be operated than with a single propeller and a single boiler.
Batillus class sister ships
- Batillus, built in 1976, scrapped in 1985.
- Bellamya, built in 1976, scrapped in 1986.
- Pierre Guillaumat, built in 1977, scrapped in 1983.
- Prairial, built in 1979, renamed Sea Brilliance, renamed Hellas Fos, renamed Sea Giant, scrapped in 2003.
- Clarkson Research Studies Ltd. (1987). Tanker Register 1987. International Publication Service. ISBN 0-8002-4143-6.
- Auke Visser (10 June 2010). "Prairial". International Super Tankers. Retrieved 29 June 2010.
- Auke Visser (10 June 2010). "Batillus". International Super Tankers. Archived from the original on 13 July 2010. Retrieved 29 June 2010.
- Auke Visser (10 June 2010). "Bellamya". International Super Tankers. Retrieved 29 June 2010.
- Auke Visser (10 June 2010). "Pierre Guillaumat". International Super Tankers. Retrieved 29 June 2010.