Underwater Demolition Command

Underwater Demolition Command Διοίκηση Υποβρυχίων Καταστροφών (ΔΥΚ)
Underwater Demolition Command (DYK) emblem
Active	1957–Present
Country	Greece
Branch	Hellenic Navy
Type	Special Forces
Role	Special Reconnaissance (SR) Direct Action (DA) Military assistance (MA) Combat Search And Rescue (CSAR) Collateral Activities (CA) Counter-Terrorism (CT)
Size	Classified
Part of	Naval Training Command (Greek: Διοίκηση Ναυτικής Εκπαίδευσης (ΔΝΕ))
Nickname(s)	Frogmen (Greek: Βατραχάνθρωποι) Frogs (Greek: Βατράχια) OYK (Greek: ΟΥΚ) Oykades (Greek: Οϋκάδες)
Website	Underwater Demolition Command
Commanders
First	Captain Charalampos Zisimopoulos
Insignia
Abbreviation	Δ.Υ.Κ.

The Underwater Demolition Command (Greek: Διοίκηση Υποβρυχίων Καταστροφών), abbreviated as DYK (Greek: ΔYK,Greek pronunciation: [ðik]) and known until 2001 as the Underwater Demolition Unit (Greek: Μονάδα Υποβρυχίων Καταστροφών), abbreviated as MYK (Greek: ΜYK,Greek pronunciation: [mik]), is the Greek Navy's elite special warfare unit.

Carrying on the tradition of the Hellenic Navy in naval special operations , the unit was established in 1957 with help from the United States Navy's Underwater Demolition Team, when two Greek officers were sent to Little Creek in Virginia to evaluate a UDT operational capability for the Hellenic Navy. On their return, they trained a dozen men who formed the nucleus of the MYK cadre.

Several diver teams (OYK) of MYK have been deployed on numerous occasions. They were deployed during the first Gulf War in 1991, providing assistance for the naval embargo against Saddam Hussein, boarding 217 suspect vessels. In 1996, the OYK were involved in the Imia crisis when Turkish commandos infiltrated the Greek rocky island of Imia. Small OYK teams dispersed in on a neighboring islet to acquire Turkish targets with the order to eliminate them if the pending political solution to the crisis and withdrawal of Turkish forces would fail.

In 1997, during the violent unrest that erupted in neighboring Albania, the OYK were responsible for taking control of the international airport of Tirana and the evacuation of 240 foreign dignitaries from Albania (Operation Kosmas).