MARS-BM
emergency voice and audio recording system
Description
MARS-BM onboard emergency voice recorder
MARS-BM is an onboard emergency recording system for continuous capture and preservation of crew communications and the acoustic environment in the cockpit. It records information needed to reconstruct crew interaction and radio exchange during flight. The system belongs to an earlier generation of aircraft voice recorders and uses cyclic recording: as operation continues, the newest interval replaces the oldest while the recorder retains the most recent 30 minutes.
Full descriptionCollapse description
Voice, cockpit audio and time recording
The recorder works with crew intercom and radio communication circuits, cockpit microphones and a coded-time input. Its four channels capture internal crew communications, external radio traffic, ambient cockpit sound and timing pulses used to correlate audio with parametric flight data. This synchronization is important during investigation because it allows spoken events and cockpit sounds to be compared with the sequence recorded by the aircraft flight-data system.
MARS-BM system composition
The MARS-BM installation includes recording and electronic equipment, microphone amplification and cockpit microphones. The crash-protected recording section is associated with the 70A-10M unit installed in the MLP-6 protective container; other documentation identifies a separate electronic block and auxiliary amplifiers in the complete system. The exact set depends on the aircraft installation, so an enquiry should state whether it concerns the complete MARS-BM system, one block, the protective container or associated microphone equipment.
Aircraft application and operating conditions
MARS-BM was used on medium and heavy aircraft in conjunction with onboard intercom systems such as SPU-7 and related interface equipment. Official flight-information guidance lists installations on several aircraft families, including Il-76, Il-86, Il-96, Tu-134, Tu-154 and Tu-204, as well as other types. The recorded-audio system operates from the aircraft 27 V DC network and is designed for aviation temperature, vibration and shock conditions; the protected section is rated for severe crash exposure.
Identification and related voice-recording equipment
The designation MARS-BM should be confirmed together with the required block, installation set, connectors and technical documentation. Catalogue links to MS-61 and P-503B are provided for navigation and do not imply direct interchangeability. Additional items are listed in the flight recorders and tape devices category. General background on the purpose and operation of this equipment class is available in the flight recorder reference article.
Technical details
- Product Type
- Onboard emergency voice and audio recording system
- Function
- Continuous recording and preservation of crew voice communications and cockpit audio
- Application / Where Used
- Aircraft voice and audio recording systems
- System / Installation Area
- Onboard voice recording system
- Compatible Aircraft / Equipment
- Medium and heavy aircraft; systems SPU-7, SPGU with USS-16 interface
All specificationsCollapse specifications
- Operating Voltage
- 27 V DC (18 to 31 V)
- Power Consumption
- Less than 20 W
- Number of Recording Channels
- 4
- Voice Frequency Range
- 300 to 3400 Hz
- Recording Duration
- Last 30 min (cyclic recording)
- Input Signal Levels (Voice Channels)
- 0.02 to 0.6 V; 0.6 to 18 V; 3 to 90 V
- Impulse Channel Input Level
- 3 to 5 V
- Output Signal Level (Playback)
- Not less than 0.6 V (voice); not less than 0.5 V (impulse)
- Operating Temperature Range
- −50 to +60 °C
- Relative Humidity
- Up to 98 % at +40 °C
- Vibration Resistance
- 5 to 300 Hz, 5 g
- Linear Acceleration Resistance
- Up to 4 g
- Shock Resistance
- Up to 12 g
- Crash-Protected Recorder
- Block 70A-10M with armored container MLP-6
- Fire Resistance
- Up to 1000 °C for 15 min
- Water Resistance
- Sea water exposure up to 36 h
- Shock Overload Resistance
- Up to 200 g
- Static Load Resistance
- Up to 1000 kg
- Technical Documentation
- Product passport, maintenance manual, operational documentation
Payment & delivery
Orders ship from our hub in Dubai. Partner stock is first transferred to Dubai, then shipped to you.
Dubai stock: 100% before dispatch. Partner stock (Remote stock) and Pre-order: 50% advance payment to start the order and 50% before shipment from Dubai to you.
Availability, lead time, delivery cost and payment terms are confirmed for your order before payment.
Payment & delivery terms