The goal of this open proposal program is to support the oceanographic research community by lending, free of charge, a battery-powered AZFP 125/200/455/769kHz or 38/125/200/455kHz mooring cage and battery for a 3-month maximum deployment period along with the support from ASL’s team of experts. This instrument loan program is open to early-career scientists and engineers, graduate students, post-doctoral fellows and others involved in oceanographic or freshwater work.