MASS

The Mobile Acoustic Scoring System (MASS) is a waterborne, portable, ship-deployable/recoverable range and training tool. MASS scores and analyzes live-fire surface gunnery exercises, air-to-ground weapons exercises, and other test and evaluation events.

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Product Description

The Mobile Acoustic Scoring System (MASS) is a waterborne, portable, ship-deployable/recoverable range and training tool. MASS scores and analyzes live-fire surface gunnery exercises, air-to-ground weapons exercises, and other test and evaluation events.

The MASS concept is based on the recognition that a projectile will generate a detectable acoustic event when it impacts water. The characteristics of this type of acoustic event can be detected and accurately located with an in-water array of acoustic sensors and digital signal processing technology.

The MASS system consists of acoustic sensors, which are incorporated into five sensor buoys. When an acoustic event occurs the buoys triangulate the location of impact. Global-Positioning Satellite (GPS) receivers provide precise positioning data of the buoys and firing platforms. Upon impact detection, the buoys transmit data to the system controller unit located on the supporting
platform. The system controller calculates and displays the projectile’s impact location in real-time allowing immediate feedback to the firing platform.

  • Automatic Scoring and Assessment
  • Reduced Mission Costs
  • Reduced mission costs
  • Improved training accuracy
  • Portable

System Components

  • Vessel base station comprising of standard laptop computer and radio transceiver
  • Vessel-based radio repeater
  • Buoy operating array, typically 5 units
  • Each buoy equipped with GPS, radio, hydrophone, radar reflector and flashing warning beacon

Buoy System Specifications

  • RF range: At least 20,000 m line of sight, maximum depending on conditions and repeater height, 900 MHz spread spectrum radio, 1 watt RF power
  • Buoy GPS self-location accuracy: Less than 10 m 99% of locations. Less than 2 m for 1 standard deviation
  • Buoy accuracy for reported time of arrival of acoustic event: 150 microsec (equivalent to spatial resolution of 23 cm)
  • Acoustic event detection range: At least 5,000 m in open ocean (low sea state conditions)
  • Buoy acoustic projector range: Maximum 2,000 m
  • Active operating time: 48 hours with fully charged battery pack
  • Flotation collar: Diameter 61 cm, depth 20 cm. Materials: ionomer foam. Colour: Yellow
  • Hull: Diameter 15 cm, length 120 cm. Materials: stainless steel. Weight: 36 kg
  • Antenna mast: Diameter maximum 5 cm, length 390 cm.
  • Materials: marine grade aluminium and stainless steel. Colour: White. Weight: 3.1 kg
  • Hydrophone: Diameter 14 cm and suspension cable, length 6.6 m.
    Materials: piezoelectric ceramic. Colour: Black. Weight: 10.5 kg in
    protective cage