Sa'ar 4.5-class missile boats are enlarged variant of the .[1] New ships were quite longer, in order to take an augmented armament.[1]
INS Yaffo was built at Israel Shipyards in the Port of Haifa. She was launched in 1998 and finished within few months.
The length of Yaffo is 61.7m (202.4feet), the breadth is 7.6m (24.9feet) and the draught is 2.5m (08.2feet). This unit has a flush deck, short superstructure located in front of the midship and freeboard. The full load displacement is 488 tonnes. The main propulsion machinery are four compression-ignition MTU 16V538 TB93 engines, which total power is 16000shp. The flank speed of this ship is 31kn; the range is 3000nmi at and at .
The primary armament is two quadruple launchers of American Harpoon anti-ship missiles, allocated directly behind the superstructure. The missile is able to reach 130km (80miles), the speed is 0.9Mach, the warhead weighs 227kg (500lb). To the aft of these launchers, six single launchers of Israeli Gabriel Mark II missiles are allocated,[2] with a 75kg (165lb) warhead and a range of about 36km (22miles). There are also two deck-mounted 8-fold anti-aircraft Barak 1 launchers with the range of 10km (10miles).[3] [4]
The secondary armament consists of single, dual-purpose gun OTO Melara 76 mm, allocated abaft in a gun turret. The quadrant angle is 85°, the weight of the projectile is 6kg (13lb), the range is 16km (10miles) and the rate of fire is 85 rounds per minute (RPM). There are also two single Oerlikon 20 mm cannon with a range of 2km (01miles) and rate of fire of 900 RPM and one double (or quadruple) station for M2 Browning machine guns. Fore, close-in weapon system, Phalanx CIWS, is located.[3] [4]