The sonobuoys in question are designated AN/SSQ-125 MAC Source Sonobuoys, and are used in anti-submarine warfare -- dropped by sub-hunting planes, such as Boeing's (NYSE:BA) P-8 Poseidon, or Lockheed Martin's (NYSE:LMT) P-3 Orion in the vicinity of enemy subs, to help localize their targets. They are expendable (meaning they need to be replaced as they are used), and use multistatic active coherent sonar to detect targets.
Delivery of the sonobuoys is scheduled for March 2015.
Fool contributor Rich Smith has no position in any stocks mentioned. The Motley Fool owns shares of Lockheed Martin. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.