Horizon Lines, Inc., (NYSE:HRZ) , the nation's leading domestic ocean shipping and integrated logistics company, recently participated in two separate anti-piracy system trials in an effort to better protect the lives of merchant mariners. In late July, International Maritime Security Network, LLC (IMSN) conducted safety drills and anti-piracy testing aboard the Horizon Crusader, while the ship docked in Orange, Texas. IMSN completed a test of the 'Triton Shield APS' system of deterrence and training. Included in the system drill were deterrent measures for approaching vessels, physical deterrents for potential unlawful boarders, security and fortification for the crew, and mitigating risk of penetration of the safe area. Training and education of key stakeholders was also conducted.