While cruising in waters off the coast on Cuba on Friday morning, crew members of the cruise ship Mardi Gras spotted what had to be a chilling sight: a small vessel in rough seas stirred up by a tropical weather system.While cruising in waters off the coast on Cuba on Friday morning, crew members of the cruise ship Mardi Gras spotted what had to be a chilling sight: a small vessel in rough seas stirred up by a tropical weather system.