1. Introduction
1.1. Neutral hydrogen surveys of the Local Universe
1.2. H I observations above z=0.1
1.3. Evolution of the Gas Content of the Universe

2. Arecibo Ultra Deep Precursor Survey
2.1. Motivation
2.2. Mapping Strategy
2.3. Target Selection
2.4. Observations and Data Reduction
2.5. RFI

3. Results

4. Summary and Conclusion