SS Las Choapas was an oil tanker built in 1898. She was originally commissioned by Standard Oil of New Jersey and built by the Delaware River Iron Ship Building and Engine Works of Chester, Pennsylvania. As the SS Atlas she saw service in World War I before being sold in the 1920s to the Italian company Ditta G.M. Barbagelata, of Genoa.

History
Name	Atlas (1898–?) Las Choapas (1941–192)
Owner	Standard Oil of New Jersey (1898-?) Ditta G.M. Barbagelata, Genoa (?–1941) Petróleos Mexicanos (Pemex), Tampico (1941–1942)
Port of registry	Tampico (1941–1942)
Builder	Delaware River Iron Shipbuilding & Engine Works, Chester, Pennsylvania
Launched	17 November 1898
Completed	December 1898
Fate	Torpedoed and sunk on 27 June 1942
General characteristics
Type	Steam tanker
Tonnage	2,005 GRT

She was seized while docked at Tampico, in Mexico on 8 December 1941 by the Mexican government and renamed, to be operated by Petróleos Mexicanos (Pemex), and homeported in Tampico.

On the afternoon of 27 June 1942, Las Choapas was hit by a single torpedo from the German submarine U-129 and sank in flames east of Tecolutla, Veracruz.^[1]