The United States Coast Guard and the Volpe National Transportation Systems Center studied the 102 serious fishing vessel accidents (1993–1997) in Coast Guard District 1 (New England and Long Island, New York), U.S. national fleet accident data, and international fishing vessel safety programs for the purpose of establishing risk factors and formulating options for future action by the Coast Guard to enhance fleet safety. The 102 regional accidents involved total vessel losses and/or death(s), excluding strictly occupational cases. Each accident was studied in detail to determine causality among human and organizational, fishery and operational, and preventive safety factors. Causality in each case was assigned among the factors, summing to 1.0 and weighted according to the outcome of the accident, i.e., numbers of deaths and injuries. The results quantify (1) the aggregate "significance" of the causal factors; (2) the average weighted outcome of accidents by type (e.g., capsize, collision); and (3) the sensitivity of (1) and (2) to varied relative weightings of vessel losses and deaths.