Horizon Lines of Puerto Rico, Inc., a subsidiary of Horizon Lines, Inc., participated in a signing ceremony of its Maritime Industry Safety Partnership Agreement with the International Longshoremen's Association (ILA) Local 1575 and the Occupational Safety and Health Administration. This agreement marks the second time Horizon Lines has taken a leadership position nationwide with a safety program of this nature. In 2002, the company became the first ocean carrier and marine terminal operator in the U.S. to sign an OSHA Strategic Partnership. This most recent activity allows Horizon Lines to make history by signing the newest partnership agreement that will focus on the health and safety of its labor force. The ceremony took place today at ILA Local 1575 Offices in San Juan.