bathythermograph, BT, mechanical bathythermograph
small torpedo-shaped device that holds a temperature sensor and a transducer to detect changes in water temperature versus depth down to a depth of approximately 285 meters, väike torpeedokujuline mõõtevahend, milles on temperatuuritajur ja -muundur, et avastada muutusi vee temperatuuris sügavuses alla 285 meetrit
