SeaBotix buoys Bolt

Thanks to its 2011 acquisition of a submersible robot company, Bolt Technology Corp. increased its sales by more than a third during its fiscal year ending this past June.

Norwalk-based Bolt earned $2 million on $52.6 million in revenue in fiscal 2012. The company’s primary product has been “air guns” towed behind ships that take seismic readings of the ocean floor to help oil and gas exploration companies find sites to drill wells.

In 2011, Bolt acquired SeaBotix, a San Diego company whose submersibles contributed $15.3 million in revenue to Bolt’s top line in fiscal 2012.

In April, Bolt renewed its lease at 4 Duke Place in Norwalk, with the renewal commencing in January 2013 and running five years.