SS Pennsylvania

Panama Pacific Line · 1929 · Ship Guide

Overview

SS Pennsylvania was the third and last of Panama Pacific Line’s large American-built intercoastal liners, created for the New York–California passenger service via the Panama Canal. She belonged to the distinctive canal-and-coastal route world rather than the classic North Atlantic express-liner tradition. Her significance lies in that intercoastal role, in her modern turbo-electric machinery, and in her later transformation into the South American liner Argentina.

In collecting and interpretation, Pennsylvania is best divided into three main phases: Panama Pacific Line intercoastal service, post-1938 South American service as Argentina, and wartime transport service. Material from those phases should be distinguished carefully rather than treated as a single undifferentiated ship identity.

Key Facts

Owner (as built)
American Line Steamship Corporation
Operator (as built)
Panama Pacific Line
Later name
Argentina (from 1938)
Later operators
American Republics Line, War Shipping Administration agents, and later Moore-McCormack
Builder
Newport News Shipbuilding & Drydock Company
Yard number
329
Launched
10 July 1929
Completed
1929
Entered service
1929
Primary route context
New York – Havana – Panama Canal – Los Angeles – San Francisco
Later route context
New York – Barbados / Trinidad – Rio de Janeiro – Santos – Montevideo – Buenos Aires (as Argentina)
Type
Ocean liner, later transport and troopship
Gross tonnage
About 20,773 GRT as built; later often cited around 18,098 GRT or 20,614 GRT after rebuilding as Argentina
Length
About 613 ft overall; 586.4 ft between perpendiculars
Beam
80.3 ft
Depth
20.5 ft (registry depth commonly cited)
Propulsion
Turbo-electric transmission driving twin screws
Power
2,833 NHP
Service speed
18 knots
Passenger accommodation (as built)
184 first class and 365 tourist class passengers
Passenger accommodation (after 1938 refit)
500 passengers as Argentina
Passenger accommodation (postwar)
359 first class and 160 cabin class passengers as Argentina
Cargo capacity
About 450,000 pounds of cargo, including 95,000 pounds refrigerated
Sister ships
California and Virginia
Final fate
Laid up in 1958 and scrapped in 1964 as Argentina

Published tonnage figures vary because sources may describe the ship as built, after 1938 rebuilding, or under different registry conventions. For cataloging purposes, preserve the exact wording used by the source or artifact being cited.

Design & Construction Context

Pennsylvania completed Panama Pacific Line’s notable trio of large intercoastal liners, which linked the U.S. East and West Coasts through the Panama Canal. Her route world was not the classic Atlantic migration or express-liner system, but a distinctly American passenger trade shaped by canal transit, coastal destinations, and long domestic journeys.

She was also part of a technically significant generation of U.S.-built turbo-electric liners. In that sense, Pennsylvania represents a specifically American interwar type of passenger-ship modernity, and one that later adapted to the Good Neighbor-era South American service under a new name.

Service History (Summary)

1929 construction and entry into service: Built at Newport News, Pennsylvania was launched in July 1929 and entered Panama Pacific Line service later that year as the third and last of the line’s large sister ships.

Panama Pacific service: In her original identity she served the New York–California route via Havana and the Panama Canal. This is the correct interpretive frame for passenger lists, brochures, deck plans, luggage labels, and route ephemera tied to the Pennsylvania name.

Intercoastal identity: Unlike the better-known Atlantic liners, Pennsylvania belonged to the American intercoastal world made possible by canal transit. That route geography should shape interpretation more than North Atlantic comparisons.

1937–1938 transition: When U.S. maritime mail subsidies were withdrawn and Panama Canal toll revisions increased costs, Panama Pacific discontinued its New York–California liner service. Pennsylvania and her sisters were taken out of service and transferred into South American operations after rebuilding.

As Argentina: Rebuilt with one funnel instead of two and revised passenger arrangements, the ship entered the New York–Buenos Aires service via the Caribbean, Brazil, and Montevideo under her new name. This phase should be treated separately from her Panama Pacific identity, even though it involved the same hull.

Wartime service: From 1942 to 1946 she served under War Shipping Administration control as a transport and troopship. This belongs to a military transport framework rather than a civilian passenger one.

Postwar and end of career: After postwar reconversion, she returned to commercial South American service as Argentina, was laid up in 1958, and was eventually scrapped in 1964. Her long later career under a different name means surviving material must be dated carefully.

Panama Pacific and the Intercoastal Route

Pennsylvania belonged to a uniquely American liner system linking the Atlantic and Pacific coasts through the Panama Canal. Her New York–California service combined long-distance sea travel with calls at Havana and the Canal Zone, offering an alternative to transcontinental rail for passengers seeking a through coastal voyage.

Her turbo-electric propulsion was part of the same modern American engineering approach used in her sisters. The system allowed steam turbines to generate electrical power for propulsion motors driving the propeller shafts, separating turbine speed from propeller speed and giving the class a distinctive machinery arrangement.

Argentina and the South American Trade

The ship was substantially rebuilt and renamed Argentina in 1938, shifting from the intercoastal Panama Pacific trade to American Republics Line service between New York and the east coast of South America.

That change was more than a new name. Passenger accommodation, tonnage, route, and commercial identity all changed, so later records should be treated as a distinct operating phase of the same hull rather than as interchangeable with the original Pennsylvania period.

War Service and Postwar Return

During the Second World War Argentina served under War Shipping Administration control in transport work. After the war she was refitted again and returned to South American passenger service, remaining active until withdrawal in 1958.

She survived well beyond the original Panama Pacific system and was finally scrapped in 1964. The long career makes her a particularly good example of how a large interwar American liner could be repeatedly reconfigured for new markets without losing the continuity of the underlying vessel.

Interpretive Notes

This is a Panama Canal intercoastal liner first: Pennsylvania should be understood chiefly within the New York–California via Panama Canal passenger system, not through North Atlantic assumptions.

The later Argentina identity is major, not incidental: because the ship had a substantial second life under another name, artifacts and photographs must be dated carefully or they can be misattributed.

Route context is especially important here: Panama Pacific material, River Plate service ephemera, and wartime transport records belong to three quite different historical worlds.

This ship represents American interwar liner modernity: turbo-electric propulsion, canal-route operation, and U.S.-built scale all help set her apart from more familiar Atlantic examples.

The 1938 rebuilding materially changed the ship’s identity: changes in funnel arrangement, passenger capacity, and route system make it important to distinguish clearly between Pennsylvania and Argentina in catalogs and interpretation.

Evidence-first ship guide

Sources (Selected)

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