Diikisi Ypovrihion Katastrofon or DYK (Underwater Demolition Command) was formerly known as Monada Ypovrixion Kastrofon (meaning Underwater Destruction Unit). DYK is the Greek Navy’s special warfare unit. DYK is divided into four detachments, or OYKs (Omada Ymourhon Katastophan). DYK has four main missions:
- Infiltration and sabotage of enemy shipping and bases
- Reconnaissance and pre-landing beach clearance an designation
- Ordinance disposal
- Maritime Counter-Terrorism
Created in 1957, MYK’s initial cadre consisted of two naval officers. The men were sent to Little Creek Amphibious Base near Norfolk, Virginia; where both men undertook the US Navy UDT/R training (the forerunner to today’s BUD/S course). Upon completion of training, the two men returned home and trained an additional dozen men. This group was assigned to the Greek Navy’s amphibious operations command.
In 1959 the unit established its own headquarters and training facilities at Squaramanga Naval Base, but additional training was provided my detachments of USN SEALS and UDT personnel. In 1970 the unit underwent a reorganization and is currently composed of 110 men divided into four operational detachments and a headquarters unit. Each detachment is composed of 25 men and specializes in a certain type of mission:
There is also a reserve OYK called OYK5 that would be activated during wartime.
The DYK training course lasts approximately seven months. Training is divided into three phases, with the completion of the course consisting of a five day long “hell week”. Candidates who successfully complete the course go on to attend the Greek Airborne course before being assigned to their unit.
The following was taken from the DYK’s Official Naval Website (http://www.hellenicnavy.gr/dyk_training_en.asp)
UNDERWATER DEMOLITION /UNCONVENTIONAL WARFARE TRAINING DIVISION
- Training staff to become specialist in underwater demolition and diving in accordance with applicable training regulations
- Taking care for the execution of NAVSPECWAR operational training
- To provide supervising means and manuals to the underwater demolition teams
- Keeping staff records for underwater demolition specialists, navy paratroopers and divers.
- Taking care for the training of underwater demolition specialists in national and overseas training centers (e.g Hellenic unconventional warfare training center – Hellenic military paratroopers school – E.O.D – other NATO SF training)
BASIC TRAINING SCHOOLS
1. Basic Underwater Demolition school
Objective: provide training to personnel in order to become Underwater demolition specialist
Participating Staff: Officers, petty officers of the Hellenic Navy, Army and Coast Guard.
Duration: 28 weeks
- Endurance in mental and physical fatigue.
- Martial arts.
- Hydrographic survey
- Diving with several types of diving equipment
- Use of standardized explosives
- Action methods for Unconventional warfare teams.
2. Diving school
Objective: to make the staff capable of diving up to 20 meters depth in order to support surface crafts and Hellenic Navy units.
Participating staff: Hellenic Navy, / Armed Forces staff
Duration: 21 working days
- Physical fitness
- Diving and lifeguard training
- Contribute in vessels safety
3. Diving Medicine school
Objective: to make the diving medical staff capable of diving up to 20 meters depth in order to support diving operations.
Participating Staff: Hellenic Navy / Armed forces medical staff
Duration: 21 working days
- Physical fitness
4. Explosive Ordinance Disposal / Standardised Ammunition School
Objective: To make staff capable to carry out EOD operations in standardized and improvised ammunition.
Participating staff: Underwater demolition officers and petty officers of the Hellenic Navy.
Duration: 3 Months
- Explosive Ordinance Disposal techniques / procedures
- Mine-sweeping operations at sea with or without contribution from mine-sweeping vessels
- Bomb/mine/ standardized ammunition disposal
5. Seal delivery vehicle operators school
Objective: to make staff capable of operating SDVs
Participating staff: Underwater Demolition Officers and Petty Officers.
Duration: 35 days
- Handling and maintenance of underwater delivery vessels
- Underwater navigation
6. Unconventional warfare craft school
Objective: to provide the staff with the necessary knowledge of navigation, nautical skills and operation of unconventional warfare craft.
Participating Staff: Underwater Demolition Officers and Petty Officers.
Duration: 15 days
- Operation and maintenance of Unconventional Warfare Crafts
- Weapon use
During the Gulf War, two OYKs tasked with enforcing the UN embargo against Irag managed to board and search an astounding 217 ships. They are armed with M-16A2 and MP-11 assault rifles, the MP-5 submachine gun, and the MG-3 7.62 light machine gun.