Gravity Data Collection: The gravity measurements in this report were collected during the 2003-2004 field season. The instrument used was the Lacoste and Romberg G-64 gravity meter. All location information (latitude, longitude, and elevation) were collected using a Trimble 4000 GPS receiver and based on WGS84 ellipsoid. The gravity data were collected along a profile in the Central Transantarctic Mountains from the Ross Ice Shelf to the Miller and Geologist Ranges. The reported values are an average of 5 readings taken at each station. The main base station for this work was the Thiel gravity base station located in McMurdo. A field base station 'moody' was established at Camp Moody by embedding a wooden board into the snow/ice. This base was tied to the Thiel base station with two one-way ties, one at the beginning and one at the end of the field season. Gravity Data Reduction: Observed gravity values were obtained from the gravity meter readings using the calibration tables provided by Lacoste and Romberg. Gravity meter drift was modeled using a splined curve through the base station readings during the survey. Bouguer gravity anomaly values were referenced to the 1980 Geodetic Reference System formula using in-house USGS software. The measurements are tied to the Thiel base station at building 146 using an observed gravity value of 982970.52 (Bucher, written commun.). A Bouguer reduction density of 2.67 g/cm3 was used to calculate the simple Bouguer anomalies. An Earth curvature correction is included in the simple Bouguer anomaly. No attempt has been made to make terrain corrections or ice thickness corrections to these data. Terrain corrections are likely to exceed 10 mGal in some of the mountainous sites. Gravity Data Table: The gravity data table contains location and gravity information. The station name is a three number identification with the exception of ‘moody’, which represents the base station. Latitudes and longitudes are reported in degrees and minutes to the nearest hundredth of a minute. Elevations are given in meters. Gravity anomalies are reported in mGals (1 mGal = 10-5 m/s2) to the nearest hundredth, except observed gravity, which is to the nearest thousandth.