The SEAWATCH Deep Sea Module (SDSM) is designed specifically for the detection of tsunamis and can be fitted to existing SEAWATCH systems or be an integrated part of new systems.
The SDSM consisting of a pressure sensor, a processor, batteries and an acoustic modem, is located on the seafloor. The SDSM is mounted to a bottom anchor using an acoustic release. This enables easy recovery of the unit when the batteries are drained after approximately one year of operation. The SDSM is released for retrieval by the acoustic release.