In 2004-05 , a large camp , Thwaites ( THW ) , was made by the USAP 150 km north of NBY . This was in order to support a large airborne geophysical survey of eastern Marie Byrd Land by the University of Texas Institute for Geophysics . In 2004-05 , a large camp , Thwaites ( THW ) was established by the USAP 150 km north of NBY , in order to support a large airborne geophysical survey of eastern Marie Byrd Land by the University of Texas Institute for Geophysics .