The Jason-class tank landing ship (Hellenic: αρματαγωγό κλάσσης Ιάσων, literally tank-carrier of class Jason) is a class of tank landing ships (LSTs) designed and built in Greece through a cooperation of the Elefsis Shipyards with the National Technical University of Athens and the Hellenic Navy, which ordered the ships in 1986.^{[citation needed]} Along with the Zubr-class LCAC, they are the primary amphibious warfare ships of the Hellenic Navy. The first was laid down on 18 April 1987, second in September 1987, third in May 1988, fourth in April 1989 and fifth in November 1989. Completion of all five and in particular the last three was severely delayed by the shipyard's financial problems, which was privatised in October 1997. Greece tried to start building a sixth ship in 2000 but cancelled it before construction began.^{[citation needed]}

HS Chios
Class overview
Builders	Elefsis Shipyards, Greece
Operators	Hellenic Navy
Built	1993–2000
In commission	1994–present
Planned	6
Completed	5
Cancelled	1
Active	5 (2018)
General characteristics
Type	Landing ship tank
Displacement	4,470 tons full load
Length	116 m (380 ft 7 in)
Beam	15.3 m (50 ft 2 in)
Draught	3.4 m (11 ft 2 in)
Propulsion	2 shafts, 2 Wärtsilä Nohab 16V25 diesels; 9,200 hp(m) (6.76 MW) sustained
Speed	16 knots (30 km/h; 18 mph)
Range	4,700 nmi (8,700 km; 5,400 mi) at 16 knots
Boats & landing craft carried	4 x LCVP 36-F Fast Landing Crafts
Troops	350
Complement	120
Sensors and processing systems	Radars: Thomson-CSF (now Thales) TRS-3030 Triton 2D surface to air & surface to surface G-band radar Fire control: Thomson-CSF Pollux TRS3220 I/J-band monopulse radar Navigation: Kelvin Hughes Type 1007 (I-band) Thomson-CSF Vega II weapons control and tactical data system
Electronic warfare & decoys	Mark 36 SRBOC chaff and decoy launching system
Armament	1 x Oto Melara 76 mm/62 Mod 9 compact gun 2 x 40 mm/L 70 Breda-Bofors guns on Type 564 naval mounts 2 x twin Rheinmetall Rh202 20 mm
Aviation facilities	1 helipad for medium sized helicopter

The ships are capable of transporting 350 infantry troops, but they can transport up to 1,200 infantry for short distances,^{[citation needed]} and they can also carry up to 22 main battle tanks (MBTs) or a variety of other equipment such as armoured personnel carriers (APCs), howitzers, MLRS launchers, trucks, etc.^{[citation needed]}

The Hellenic Navy used the Jason-class ships to replace older American landing ships from the Second World War era.^{[citation needed]} The Hellenic Navy preferred to not buy new ships from other nations in order to acquire experience in the design and construction of warships entirely in Greece.^{[citation needed]}

Although the new ships replaced Second World War-era LSTs, the Hellenic Navy did not equip the Jason-class ships with marine fighting vehicles (such as BMP-3F) and therefore Greek marines have to use tactical landing methods similar to those of the Second World War era. Although, Greece purchased 76 AAV-7A1 RAMS from EDA of USMC in 2022. Each landing ship can carry up to 15 AAV-7 and 300 Marines.^{[citation needed]} The ships also use two types of Landing Craft Vehicle Personnel (LCVPs): the type 36 and the type 36F (with F meaning Fast).^{[citation needed]}