Witt O’Brien’s, a part of Seacor Holdings, has bought maritime crisis communications companies Navigate PR and Helix Media.

Witt O’Brien’s principally acts as an emergency response company for governments and corporations. It specialises in providing emergency response services required under US pollution laws.

However, Witt O’Brien’s chief executive Tim Whipple said its clients are increasingly asking for the sort of media response and reputation management services provided by Navigate and Helix.