ISTANBUL A sea mine was discovered floating off Black Sea coast in Istanbul’s northern district of Şile, with teams set to destroy the explosive device on Dec. 23. The device was found on Dec. 22 off the coast of Ağva, some 50 kilometers (30 miles) east of the point where the Bosphorus Strait enters the Black Sea. Since Russia invaded Ukraine in February 2022, the warring sides have both deployed mines to protect their coastlines, but they have often been displaced by storms. Given the threat