"British Antarctic Survey prototype re-usable Sonic sonobuoy"@en . . "SDN:L22::TOOL1258" . "A British Antarctic Survey-built prototype of a free-floating re-usable sonobuoy, designed to record low frequency acoustic information generated by remote marine seismic sources. The instrument is used in conjunction with a towed airgun array, or other remote marine seismic sources. Further details can be found in section 10.10 of JR18 cruise report."@en . .