The 9/11 memorial events were underway downtown as Coast Guard icebreaker Penobscot Bay came up the North River as far as Pier 99 with her fire monitors running, passing the Lincoln Tunnel vents and a Donjon Marine crew working on seasonal dredging at the cruise terminal. In addition to providing a visual salute, Cutter 107 had machine guns mounted on her bridge wings so also serving a security role. Penobscot Bay is one of two big icebreaking tugs based in Bayonne whose primary mission is keeping the Hudson clear for navigation up to Albany in the winter.