Global Marine, previously owned by Bridgehouse Capital, has seven vessels operating worldwide, plus ROVs.
HC2 said the purchase price reflected an enterprise value of about $260m, including assumed debt.
It was funded through a new senior secured credit facility provided by Jefferies Finance and a sale of convertible preferred stock to DG Capital Management and another investor.
Global runs its business from Chelmsford in the UK and Singapore and its shareholders were advised in the deal by corporate finance advisory Park Partners.
HC2
