front fronta boundary between two water masses with differing properties such as temperature and salinity Related Articles: Glossary: phocids or true sealsGlossary: pitchManateeBearded SealAbout DOSITSDr. MillerBeaked WhalesForward Looking SonarBryde's WhaleHow is sound used to measure waves in the surf zone? Chris Knowlton2017-10-19T12:47:54-05:00