Post-tsunami field investigations are an essential component for improving our understanding of tsunamis and in developing the tools and programs necessary to mitigate their effects. A destructive tsunami can attract a large number of international, national, and local tsunami professionals interested in conducting post-tsunami science surveys to investigate and document its scientific, economic, and social impact on affected coasts and communities. Science data collected immediately after a damaging tsunami are equally important for government decision makers. In the short term, these data help to better organize and deploy often-limited resources to the most critical areas needing response. In the long term, these data are used for recovery planning that will mitigate losses from the next tsunami. Without a coordination plan that is integrated into government emergency response operations, perishable data may prove to be logistically difficult to gather before erosion or bulldozers eliminate the evidence, and in all likelihood, the operations could interfere and conflict with emergency activities. Additionally, during catastrophic tsunamis, affected areas and local jurisdictions may be simultaneously overwhelmed by many government agencies, nongovernment organizations, and the media all demanding information and/or access, thus making collection of useful data even more challenging unless a coordination and information sharing plan is already in place.