Dear MARMAM, On behalf of my co-authors, I am pleased to announce the publication of our article in *The Journal of the Acoustical Society of America*: A description of echolocation clicks recorded in the presence of True's beaked whale (*Mesoplodon mirus*) Annamaria Izzi DeAngelis, Joy E. Stanistreet, Simone Baumann-Pickering, and Danielle M. Cholewiak Abstract True’s beaked whales (*Mesoplodon mirus*) were encountered on two separate shipboard surveys on 24 July 2016 and 16 September 2017 in the western North Atlantic Ocean. Recordings were made using a hydrophone array towed 300 m behind the ship. In 2016, three different groups were sighted within 1500 m of the ship; clicks were recorded for 26 min. In 2017, a single group of five whales was tracked over the course of five hours in which the ship maintained a distance <4000 m from the group. A total of 2938 frequency-modulated (FM) clicks and 7 buzzes were recorded from both encounters. Plausible inter-click-intervals (ICIs) were calculated from 2763 clicks, and frequency and duration measurements were calculated from 2150 good quality FM clicks. The median peak frequencies were 43.1 kHz (2016, n= 718) and 43.5 kHz (2017, n= 1432). Median ICIs were 0.17 s (2016) and 0.19 s (2017). The spectra and measurements of the recorded clicks closely resemble Gervais’ beaked whale clicks (*Mesoplodon europaeus*) and distinguishing between the two species in acoustic data sets proves difficult. The acoustic behavior of True’s beaked whales was previously unknown; this study provides a description of echolocation clicks produced by this species. For the full article, please visit https://doi.org/10.1121/1.5067379 To request a PDF copy, please email annamaria.deangelis@noaa.gov. Cheers, Annamaria Annamaria DeAngelis *Research Analyst* Passive Acoustics Research Group | Northeast Fisheries Science Center 166 Water Street, Woods Hole, MA 02543 annamaria.deangelis@noaa.gov