Page 87: of Maritime Reporter Magazine (September 1993)

The first controllable-pitch propeller installed on a harbor tug in this country was in 1952 on the 100-foot Dalzellera, operated by the Dalzell Towing Company of New York.

EXCHEQUER LAUNCHED

The steamship Exchequer, first all-welded rivetless dry cargo ship sver constructed in the United States, as she slid down the ways last

Saturday at the yard of the Ingalls Shipbuilding Corporation for the \merican Export Line, which also has three similar vessels under construction at the same yard.

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Engineering News has a larger circulation to executives and key men shoreside in vessel operations, shipbuilding, ship repair and naval architecture than any other marine magazine in the world. (formerly Coastdesign Inc.)

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