We conduct an analysis to estimate the value of information (VOI) of Earth observations for prospective regulation of marine shipping to conserve Eastern North Pacific blue whales in the Exclusive Economic Zone of the United States. Outcomes are driven by differences across two data products that can be used to inform regulations to limit ship strikes. In the reference case, vessel speed limits depend on species distribution data from shipboard surveys. In the counterfactual case, speed limits depend on species distributions predicted by WhaleWatch, a federal data product incorporating information from several remote sensing technologies. The VOI is identified as the difference in costs to marine shipping operators under the reference and counterfactual cases for regulation of vessel speeds. We estimate that the annual VOI of WhaleWatch is US$21–332 million, depending on the conservation goals of the modeled regulation. Conserving more blue whales—averting more ship strikes—increases the VOI.