MR708 MuLti-RoLe Fuze

Multi–Role, Doppler Ranging Radar Proximity nose mounted fuze to provide airbursts for Mk80 series low drag bombs.
The fuze is based on a Direct Sequence Spread Spectrum (DSSS) technique utilizing a transceiver being modulated by a pseudo random binary code (digital modulation) which is transmitted into free space. The modulation by the pseudo random binary code spreads the signal across a wide bandwidth, suppressing the transmission power density per unit frequency band making it difficult to detect, intercept or demodulate and is harder to jam which offers excellent ECCM capability.

Height of Burst (H.O.B) is factory set at 6m A.G.L for all types of targets, approach angles and closing velocities, independent of terrain reflectivity as well as being immune to battlefield disturbances such as dust, smoke and radio emissions. The fuze has a super-quick impact back-up operation mode. Proximity function dramatically increases weapon effectiveness against:

• Personnel, thin skin vehicles, radar, and light armour
• Area coverage, soft targets, including personnel
• Dug-ins without overhead protection
• Uneven terrain with obstacles
• Soft soil target areas

Impact Detonation Backup System ensures impact detonating action on all types of targets, including water and soft ground.

An airflow sensor ensures the fuze does no arm below 220CAS. In the High drag mode a G-Sensor guarantees that the fuze will not arm if the retarder tail unit does not open up fully.

The fuze meets MIL-STD-1316 with two independent arming mechanisms. i.e. Airflow sensor which requires a minimum air speed of 220CAS (1) and a rotor lock (2) which are both activated by arming wire pull after release from the fighter platform.

All arming mechanisms are locked in place during storage. In-flight and are released by arming wire pull. Safe and Arm is an out-of-line rotor design, controlled by a hybrid stepper motor. Weapons released in ripple or salvo without mutual interference.