BioSonics DT-X SUB echosounder deployed in a yearlong project to assess biomass (fish and plankton) in Papua New Guinea. The system is configured with 38 and 200 kHz transducers and operating in a fully autonomous mode. The DT-X-SUB is powered by (3) Ocean Sonics battery packs and will operate on a 15% duty cycle to extend battery life and allow for 3-month deployments. The hardware is mounted in a custom mooring frame deployed in 400 m of water. The DT-X SUB system will measure demersal and pelagic fish biomass and the diel migration of plankton over the course of this 12-month study
![](https://static.wixstatic.com/media/417e9a_197a38cbb37d4d0da07783fa70a203f1~mv2_d_4032_3024_s_4_2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/417e9a_197a38cbb37d4d0da07783fa70a203f1~mv2_d_4032_3024_s_4_2.jpg)
![Illustration of DT-X SUB deployed on a mooring with two transducers simultaneously operating in up-looking and down-looking orientation.](https://static.wixstatic.com/media/417e9a_29b461a47f1947789c6cf6e8bfdeec8c~mv2.jpg/v1/fill/w_116,h_145,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/417e9a_29b461a47f1947789c6cf6e8bfdeec8c~mv2.jpg)
![Custom mooring frame for submersible echosounder and battery canisters](https://static.wixstatic.com/media/417e9a_87bf641af0bc464894a575990b421985~mv2.jpg/v1/fill/w_122,h_148,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/417e9a_87bf641af0bc464894a575990b421985~mv2.jpg)