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The Strait of Çanakkale, is connecting the Black Sea with the Aegean Sea and Mediterranean by the Sea of Marmara is one the most important and risky straits in the world. Nearly 45.000 ships passed through Çanakkale in 2017. Çanakkale Strait contains high risks for marine accidents such as grounding and collision due to intense marine traffic. In the study, the marine accidents that occurred in the Strait of Çanakkale for 2001- 2015 have been analysed by using frequency distribution and Chi Square Test. The main findings of the study are as follows: The most accidents occurred between September and November; the most accidents occurred in the hours between 24:00–04:00; grounding/stranding was the most common accident type, respectively collision to occur in the Strait of Çanakkale;dry bulk ships were involved in the most accident, respectively cargo ships; the ships with a gross tonnage of less than 3,000 gross tonage and Turkish Flag vessels were those most involved in accident, human error is the maincause of accidents. As a result of the study suggestions for measures to be taken are given for the prevention of accidents and environment protection.

The Turkish Straits which comprise the Strait of İstanbul, the Strait of Çanakkale and the Sea of Marmara connect the Aegean and Mediterranean Seas and the Black Sea. The Straits are one of the most hazardous and crowded waterways in the world. The Straits are important from the point of international politics and commerce. The aim of the study is to analyse the accidents that occurred in the Strait of İstanbul from the implementation of the Maritime Traffic Regulations for the Turkish Straits and the Marmara Region in 1994 until 2019 using frequency distribution, Chi Square) and Cramer’s V Tests. The main findings of the study have given as follows; the cargo ships were the most involved in the accident; accidents are mostly collision and respectively grounding; the most accident has been occurred in the hours 20:00-24:00, main reason of accidents is human error and a total of 71.5% of the ships involved in the accident have not taken a pilot in the Strait of İstanbul. There is a statistically significant relationship between accident type and accident year; between accident type and the ship types involved in the accident and between accident type and whether the ship involved in the accident had a pilot; relationship between ship type involved in the accident and whether to take a pilot or not. At the conclusion of the study suggestions are proposed to provide safety of environment and navigation in the Strait of İstanbul.