The article deals with conceptual metaphors tied to the source domain SEA in Lithuanian political and economic discourse. The study is based on the dictionary compiled during the research project “Conceptual Metaphors in Public Discourse”, funded by the Research Council of Lithuania. The analysis refers to the traditional conceptual metaphor theory, theoretical problems relevant to metaphor analysis in discourse are considered. Features of the source domain SEA conceptualize the political and economic instability and insecurity. Although political and economic discourses are rather different, the analysis of metaphorical expressions related to the source domain SEA reveals that their linguistic, conceptual and communicative properties are basically compliant.