Srogram-class corvette

The Srogram-class is Mirhaime's newest class of ocean-going corvettes or for the force projection capability "Offshore patrol vessel" (even without an Battleship commander according to the Mirhaimian Navy Norms). Having entered service with the first of its class, MRAS Zisak'drah, being laid down in 2008, 14 vessels are in service with the MRA as of 2022.

Design

Bridge

The Combat Direction System (CDS) is the central processor of vessels of the Srogram-class, and is comparable to the Aegis combat system currently in use by navies of other countries. It consists of consoles, computer interfaces, and connecting networks as well as an proprietary operating system (OS), and software for operational applications and usage. With the introduction of the Srogram-class, a new generation of computer architecture was introduced into Mirhaime Realm Armada service, and has since been introduced on all new surface combat vessels. The CDS controls all weapons and sensors on the basis of commerically available computers (COTS) and processes the data from its own sensors, and external sources automatically with minimal human inputs. From there, it creates an interface with necessary informations, and relay them to the crew of the vessels via said interfaces. Any threats emanating from detected targets are calculated and displayed by the CDS based on ESM lock, kinematics, emitter parameters, positions, etc. Sensors and weapons can be linked to function chains, and be used automatically - again - with minimal input from the crew.

The ZARAS-3D radar, PMZ BK 9000BC, two EO/IR cameras of the Mirador type, two navigation radars, and the IFF radar MSSR 2000I are available as on-board sensors.

The corvette was the first in the MRA whose Combat Information Center (CIC) operate with the ZARGE config. All available situation information, including that of the system's hardware and software can be displayed on seven multifunction consoles, each with two 21" TFT monitors and a large-screen display. A realm-time network and a non-real-time network enable the digital data exchange of the sensors and weapons with the CDS consoles in the ZARGE-CIC and on the integrated bridge. Video images from the sensors and weapons are distributed to all connected consoles and workstations via an additional on-board intranet which was also integrated into the F124 architecture, connecting the different sub-networks of the vessel with one another. The concept of the integrated bridge is based on the concept of the one-man bridge of modern merchant ships. The devices, displays and screens on the bridge have been combined into a compact system based on modern ergonomic aspects. In addition to the navigational situation, the ship data, all information from the ship;s technical area and the complete situation picture of the CDS are displayed on the six screens of the integrated bridge.

Sensors

ZARAS-3D Radar

The ZARAS-3D radar was manufactured by Putz Technology Inc. and operates in the C-band (4-8 GHz). The radar consists of a 1.2m x 0.4 m small rectangular sensor at the top of the mast, weighing approximately 340kg. For this purpose the transmission signal which is generated in a traveling wave tube, is radiated through 16 lines, each consisting of 46 modules. The radar performs sidelobe suppression and can change the transmission characteristics such as pulse length, pulse repetition rate, polarization and frequency from transmission pulse to transmission pulse with the transmission frequency being selected randomly. The radar has two plot extractors, one for air targets and the other for surface targets. The plot extractors can determine and then select the frequency with the least disturbance. The radar can identify flying targets such as helicopters, and fixed wing aircrafts automatically with additional non-cooperative target identification (NCTI) or friend-foe detection (IFF) capabilities. On top of this, the radar can track up to 300 sea and air targets simultaneously. The pencil beam normally covers 20° to 70° in elevation (short-range mode), but can also form a wide lobe with 7.5° in azimuth in the range from 0° to 15° elevation (long-range). In the anti-aircraft surveillance mode, seven superimposed beam positions from 0° to 45° are selected, with variable transmission energy. The radar can interleave the different transmission modes. Low-flying anti-ship missiles can be detected in from around 20-21 km, combat aircraft at 10° elevation in about 60-75 km, anti-ship missiles at 10° in about 42 km. In self-defense mode, the antenna rotates at 30/min, in clutter-heavy environments at 17/min. In surveillance mode, the rotation rate is only 10/min, but the detection range against fighter planes increases to 110 km.