LOT (az goll. lood), asbob baroi az boloi kishti chen kardani umqi ob. Lokhoi dasti, mekhaniki va gidroakustiki mavjudand. Loki dasti porsangi surbi yo chuyanii (massaash 3,5—5 kg) konus (piramida)-shaklest, ki ba nugash simtanob (lotlin) basta shudaast (simtanobro ba metrho taqsim mekunand). Bo yorii on umqi bahrro to 50 m chen kardan mumkin ast (hangomi az 5— 9 km/s besh nabudani surati kishti).
Kori Loki mekhaniki ba chen kardani fishori gidrostatiki dar naychae, ki yak nugash mahkamu nugi kushodash ba ob gutonida shudaast, asos mekunad. Bo yorii on umqi bahrro az 10 to 200 m (az boloi kishtie, ki suratash az 28 km/s besh nest) chen kardan mumkin ast. Umqhon az in ziyodaro bo yorii Loki gidroakustiki chen mekunand. Nig. Ekholot.