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The objectives of this TO are to conduct aerial surveys of the study area in order to: 1) provide estimates of seasonal abundance for seals and sea lions, 2) identify seasonal distribution patterns for seals and sea lions, 3) collect data to determine seal and sea lion densities, and 4) provide harbor seal abundance data needed by NMFS to prepare a Stock Assessment Report (SAR) for the Washington inland waters harbor seal stock. Additionally, the atlas showing pinniped haulouts for these waters (Jeffries et al. 2000) has not been updated in 13 years and will be revised as well.