The aim of this paper is to present the expertise procedure in diving accidents at the Institute of Forensic Medicine and Criminology in Rijeka and to present and analyze deaths of divers in the period from 2013 to 2021. An insight into the expertise cases reveals the procedure applied at the said Institute, while the established facts may be used as basis of some future research or work that could expand the expertise procedure and improve prevention, all in order to reduce the number of diving-related deaths. This paper covers 21 deaths of divers in the Kvarner area in the period from 2013 to 2021. Variables taken into account in writing this paper include the biological profile of the victims (age and sex), year of death, type of diving if listed in the literature (free diving/snorkeling or scuba diving), diving method (group or individual diving), nationality of the diver (domestic or foreign divers) and the presence of previous pathological conditions in the victims. All victims underwent an autopsy, which, in addition to taking tissue samples for histological examination and, if necessary, tissue samples, secretions, excreta, blood and cerebrospinal fluid for bacteriological, biochemical, toxicological and molecular analysis, is the basis for determining the cause of death and classifying death as a result of a violent, natural and accidental drowning. This paper could encourage reflection on potential prevention, which is certainly one of the measures that could prevent an unfavorable or fatal outcome in diving in the future, both in amateur and professional divers.