NPS observers were involved in the 1973 work conducted by the State of Texas under the direction of Carl Clausen and later work under Barto Arnold. In July 1985 and June 1986, the SRC led joint field operations with the cooperation of the Texas Antquities Committee at Padre Island. A shallow, near-shore area north of the Mansfield Cut was surveyed using magnetometry. Anomalies discovered then and during the 1985 survey were optically positioned, relocated and ground-truthed. Some beach excavations were also conducted.

• April 1992 – Reconnaissance of beached shipwreck materials. Larry Murphy and Jim Bradford, Project Archeologists.

• June 1986 – Phase II Survey. Magnetic anomaly location and test excavation. Larry Nordby, Barto Arnold and Larry Murphy worked on the survey.

• July 1985 – Marine and terrestrial magnetometer survey and site evaluation. Larry Nordby, Principal Investigator.

• August 1973—site visit by Dan Lenihan of SRC during project being conducted by State of Texas under direction of State Marine Archeologist Carl Clausen.

• Arnold, J. Barto III, 1997, Encyclopedia of Underwater and Maritime Archaeology edited by James P. Delgado, Yale University Press. (Multiple entries for Padre Island)

• Arnold, J. Barto III and Weddle, R. S., 1978, The Nautical Archeology of Padre Island: The Spanish Shipwrecks of 1554, Academic Press, New York.