Thermometer: Pamene kutentha kwa thanki yosungiramo gasi yamafuta kumawonjezeka, kupanikizika mkati mwa thanki yosungira kumawonjezeka moyenerera. Pofuna kupewa kupanikizika kwambiri mu thanki yosungiramo Kuti mukwaniritse cholinga cha decompression, zida zopopera ziyenera kuyatsidwa kuti ziziziritsa thanki yosungiramo.