[1] Before becoming commander of the Ukrainian Navy, Hayduk held the staff position in charge of anti-submarine warfare,[2] the position of chief of search and rescue operations,[3] and was the first deputy chief of staff of the navy.

[4] In 2007, he prevented an environmental disaster from ensuing when the leaky Russian vessel Odisk arrived in Crimea from Sierra Leone carrying ferroalloys.

[7] Berezovsky had been dismissed for "high treason" after serving only a single day as commander.

After a speech by Hayduk, all the officers rejected the proposal and started to sing the Ukrainian national anthem.

[8] On 19 March 2014, pro-Russian forces took over the Ukrainian Navy's headquarters at Sevastopol and imprisoned its newly appointed commander-in-chief, Hayduk.