four 290 mm ground-to-ground rockets with high-explosive/fragmentation (Ivry-1) or cluster (Haviv) warhead. Was adopted in 1973, saw combat for the first time in the 1982 Lebanon War. Is colloquially known as MAR-290, and the name Ivry is also sometimes applied to the launching vehicle. An improved launcher on the Centurion tank chassis was later developed, but remained experimental. In the 1990s was replaced in active service by the M270 MLRS. Kilshon (Trident) or Kachlilit – The Kilshon was developed to reduce the losses suffered by SAM suppression aircraft by launching anti-radiation missiles from the ground. The Kilshon was based on turretless hull of the Sherman M-51 on which an AGM-45 Shrike anti-radiation missile launcher was mounted. To deliver the desired range, a specially modified AGM-45 with booster was used. Later a prototype was developed for use with the AGM-78 Standard anti-radiation missile, but with the retirement of Shermans from IDF service the Keres (Hook) system was placed onto a heavy truck chassis for the finalized design instead. Support tanks See Armoured recovery vehicle for TRV/ARV photo. Sherman Morag – Israeli designation of Sherman Crab mine flail vehicle. Trail Blazer (Gordon) – A recovery/engineering vehicle based on HVSS equipped M4A1s, it featured a large single boom crane (as opposed to the A-Frame of the M32) and large spades at the front and rear of the vehicle to assist in lifting. It could also tow up to 72 tons. Sherman Medical Evacuation Tank (Ambutank) – A radical conversion of the M4 with the turret removed and the powerplant (changed to a diesel engine) moved to the front of the tank. A medical team and four casualties could be carried in an armoured compartment at the rear. Early vehicles were based on M4A1 hulls with VVSS suspension and are often referred to as "VVSS version". Later vehicles used hulls with HVSS suspension and were fitted with a big boxy superstructure. This version is often referred to as "HVSS version". Many were used during the Israeli-Egyptian War of Attrition (1968–70) and the Yom Kippur War. Eyal Observation Post Vehicle – A Sherman that had the turret replaced with a 27 m (90 foot) tall hydraulically erected observation platform. This was used near the Suez Canal as a mobile observation post, before the Yom Kippur War. Civilian variants After World War II, demilitarized Shermans were widely available and relatively cheap. Many were heavily modified for