The propo 而 on of dozing in allship accidcnts js about 7％ ( 2006 ) ， The purpose ofthis study was to investigate ship accidents caused by dozing watch − 1 (eepers ． Marine accidents that had been described to the judgment record of the Marine Accjdents Inquil ' y Agellcy between l994 and 2003 were used fbr analysis ． The authors investigated the relationship between the situations at the doze shipwreck by analyzing data that included a 30 − jtem categorization procedure， and perfbrming a Ctuster Analysis ． Analysis also included categorization of accidents according to the type ofvesse ［and vessel use ( i£ ， ， fishing vessels ； cargo ships ) ． In both types of vessels there was a notable re 】 atiollship betwecn tlle situation of し The passage of time from the departure port is long ｝ コ and the infiuence of 」 輻 、 Vork tiredness " ， The analysis of fishing vessels revealed there was a notable relationship between the situatiQn of " The passage oftime 廿 om the departure port is long " and the influence of both " Awake rhythm " and 」 」 Work tiredness " ． The ana ］ ysis of cargo ships revealed there was a notable reiationship between the situation of t ' The passage oftime from the departure port is IQng " arld tlle influence of ' ' No stimulation " ， Thesc results suggest that consideration of vessel type and usc Inay be necessary in developing connter measures against dozing accidents that result from long − duration navigations ．