Sa'ar 4.5-class

The Sa'ar 4.5 class was developed as an improved and lengthened evolution of the Sa'ar 4-class missile boat to serve within the Shayetet 3 flotilla. The class is divided into two distinct subclasses, originally designated as Chochit and Nirit, later renamed Aliya and Hetz respectively. Initial construction began in the early 1980s, though certain units faced production delays due to funding constraints. Several vessels in the class were constructed by integrating weapon systems salvaged from decommissioned hulls onto new Sa'ar 4.5 platforms. The fleet reached its current strength through the early 2000s, with a planned replacement cycle scheduled to begin in the mid-2020s.

This platform is a missile boat featuring upgraded propulsion and electronic suites. The Aliya subclass is configured with aviation facilities, functioning as a warship capable of housing a helicopter hangar and helipad. In contrast, the Hetz subclass lacks aviation capabilities, instead utilizing a lengthened hull to accommodate an expanded armament payload. Both variants utilize sensor arrays, including active electronically scanned array radar, fire-control radar, and electronic warfare suites such as chaff rocket launchers and radar warning receivers. The armament consists of anti-ship missile batteries, surface-to-air missile systems, and automated close-in weapon systems for point defense.

Active service of the Sa'ar 4.5 involves combat operations and maritime security. In the mid-1980s, units equipped with aviation facilities conducted strikes against coastal facilities in northern Lebanon, deploying ship-borne helicopters to engage targets. Beyond the primary operator, units have been transferred for service in international navies, where they function as missile platforms. Other variants have been modified for offshore patrol duties; in these configurations, missile systems are removed and replaced with deck cranes and smaller caliber naval guns. The class has been deployed in sustained maritime operations, such as Operation Protective Edge.