[4] Romach, as other Sa'ar 4.5-class missile boats, has a flush deck, short superstructure located in front of the midship and freeboard.

[1][2] The primary armament is two quadruple launchers of American Harpoon anti-ship missiles, allocated directly behind the superstructure.

[1][2] There are also six single launchers of Israeli Gabriel Mark II missiles allocated behind them[1][4] with a 75 kg (165 lb) warhead and a range of about 36 km (22 mi).

The weight of the projectile is 6 kg (13 lb), the range is 16 km (9.9 mi) and the rate of fire is 85 rounds per minute (RPM).

[5][1] There are also two single Oerlikon 20 mm cannon with a range of 2 km (1.2 mi) and rate of fire of 900 RPM and one double (or quadruple) station for M2 Browning machine guns.