A better understanding of the distribution and migration patterns of marlin and the environmental and biological parameters that determine it, together with an evaluation of the nature and extent of the interaction between the recreational and commercial fleets within Area E, is one of the Eastern Tuna MAC’s top research priorities. This pilot study will provide fine-scale movement data in the recreational fishing areas, and evaluate PSTATs in providing the detailed information on movement dynamics of black marlin critical to any evaluation of the interaction between the two fisheries. Only when this information is available, will it be possible to incorporate movement dynamics, oceanographic models of circulation in the Coral Sea, and the operational characteristics of the charter and longline fleets into a model to evaluate the availability of black marlin to the charter fleet under different levels of longline effort within Area E.