The HIZIR Torpedo Countermeasure System has been designed to enhance the survivability of high-value surface combatants in modern naval warfare, where advanced acoustic homing torpedoes pose a critical threat. Contemporary torpedoes incorporate active and passive sonar seekers, counter-countermeasure (ECCM) logic, adaptive targeting algorithms, and wake-homing capabilities. These evolving threats require intelligent, layered, and networked countermeasure systems rather than standalone decoys.

Operational Purpose and Role

HIZIR’s primary mission is to detect an incoming torpedo at the earliest possible stage, classify the threat, determine its engagement parameters, and deploy the most suitable countermeasure strategy to maximize ship survivability.

It is suitable for:

• Frigates
• Corvettes
• Offshore Patrol Vessels
• Amphibious Ships
• Logistic Support Vessels

The system forms the underwater defensive layer of a ship’s overall layered defense concept.

Doctrine and Concept of Operations

Naval anti-torpedo doctrine typically includes three phases:

• Early detection and tracking
• Deception and acoustic disruption
• Evasive maneuvering

HIZIR integrates all three phases within a unified framework.

The towed acoustic detection array identifies torpedo signatures at extended distances. Advanced digital signal processing algorithms analyze incoming acoustic data and compare it against a threat library database. After classification, the system can:

• Initiate broadband or narrowband acoustic jamming
• Deploy programmable expendable decoys
• Provide tactical maneuvering recommendations to the ship

The system can operate in manual, semi-automatic, or automated modes depending on operational doctrine.

System Architecture

HIZIR consists of the following major subsystems:

• Towed Acoustic Detection Array
• Signal Processing and Analysis Unit
• Operator Console
• Decoy Launcher System
• Remote Control and Power Unit

The towed array operates at a distance from the ship’s own acoustic noise source, enhancing detection sensitivity and improving signal clarity.

The system is designed for full integration with the ship’s Combat Management System, enabling sensor fusion and coordinated threat evaluation alongside other onboard sensors.

Survivability Approach

Modern torpedoes may employ:

• Active sonar homing
• Passive acoustic homing
• Wake-homing tracking

HIZIR uses broadband and narrowband acoustic jamming techniques to degrade or saturate the torpedo seeker’s tracking logic. Programmable decoys mimic the acoustic signature of the host vessel, diverting the torpedo away from the ship.

Its ability to counter multiple torpedoes simultaneously provides a significant advantage in saturation attack scenarios.

Detection, Reaction, and Engagement Process

Specific detection ranges and reaction times are not publicly disclosed.

The general engagement sequence is as follows:

• Acoustic contact detection
• Automatic track initiation
• Threat classification via signature library
• Countermeasure selection
• Decoy launch and/or acoustic jamming activation
• Evasive maneuver recommendation

Integrated Systems and Ecosystem

HIZIR can integrate with:

• Ship Combat Management Systems
• Onboard sonar systems
• Electronic warfare subsystems
• Navigation and maneuver control systems

This integration ensures a coordinated and optimized defensive response.

Advantages Against Modern Threats

• Simultaneous multi-torpedo defense capability
• Library-supported classification algorithms
• Programmable countermeasure deployment
• Modular design adaptable to various ship classes

Limitations

• Precise performance parameters are not publicly disclosed
• Detailed effectiveness against wake-homing torpedoes is not publicly available
• Operational effectiveness depends on ship acoustic signature management and tactical execution

Detailed Technical Information

Dimensions and Weight

Exact system dimensions and total weight are not publicly disclosed. Configuration varies depending on ship class and installation layout.

Power System

Powered by the ship’s main electrical system. Detailed power consumption data is not publicly available.

Performance Parameters

• Detection range: Not publicly disclosed
• Number of simultaneous torpedo engagements: Multiple (exact number not disclosed)
• Reaction time: Not publicly disclosed

Sensors

• Towed acoustic detection array
• Advanced digital signal processing unit
• Threat signature database library

Target Detection and Tracking

• Automatic track initiation
• Continuous threat tracking
• Acoustic signature analysis

Countermeasure and Engagement

• Broadband acoustic jamming
• Narrowband acoustic jamming
• Programmable expendable decoys
• Maneuver advisory algorithm

Command and Control

• Full integration with Combat Management Systems
• Manual and semi-automatic operator control

Electronic Warfare and ECCM

Detailed electronic counter-countermeasure capabilities are not publicly disclosed. The system is designed to address modern torpedo ECCM logic.

Deployment and Mobility

Shipborne fixed installation. The towed array is deployed from the stern section during operations.

Personnel and Operation

Operated from the ship’s Combat Information Center by trained naval personnel. Additional dedicated crew requirements are not publicly disclosed.

Frequently Asked Questions

What does the HIZIR system do?

• HIZIR protects surface ships against modern acoustic-guided torpedoes by detecting, classifying, and deploying countermeasures in an integrated defensive framework.
• It actively deceives and disrupts torpedo seekers rather than merely providing warning.

How many torpedoes can HIZIR counter simultaneously?

• The system is designed to handle multiple simultaneous torpedo threats. The exact engagement capacity is not publicly disclosed.

Is HIZIR a mobile system?

• HIZIR is a shipborne system. There is no publicly disclosed land-based or standalone mobile version.

Which types of torpedoes can it counter?

• It is designed against active and passive acoustic homing torpedoes. Detailed information regarding effectiveness against wake-homing torpedoes is not publicly disclosed.

What are its international equivalents?

Comparable systems internationally include:

• AN/SLQ-25 Nixie
• Surface Ship Torpedo Defense systems

HIZIR differs by being domestically developed and optimized for Turkish naval requirements.

Sources

• ASELSAN official product documentation
• ASELSAN defense exhibition catalogs
• Public defense industry briefings and press releases