Icebreaking http://www.piersystem.com/go/site/443/ Photos of icebreaking operations on the Great Lakes MACKINAW BREAKING ICE http://www.piersystem.com/go/doc/443/203206/ http://www.piersystem.com/go/doc/443/203206/ Icebreaking U.S. Coast Guard - 9th District 2008-05-16T15:48:04-05:00 MACKINAW BREAKING ICE http://www.piersystem.com/go/doc/443/202138/ http://www.piersystem.com/go/doc/443/202138/ Icebreaking U.S. Coast Guard - 9th District 2008-05-13T16:06:48-05:00 enhance21.jpg http://www.piersystem.com/go/doc/443/202137/ http://www.piersystem.com/go/doc/443/202137/ Icebreaking U.S. Coast Guard - 9th District 2008-05-13T16:05:35-05:00 MACKINAW BREAKING ICE http://www.piersystem.com/go/doc/443/202136/ http://www.piersystem.com/go/doc/443/202136/ Icebreaking U.S. Coast Guard - 9th District 2008-05-13T16:04:20-05:00 MACKINAW ICE BREAKING http://www.piersystem.com/go/doc/443/200927/ http://www.piersystem.com/go/doc/443/200927/ Icebreaking U.S. Coast Guard - 9th District 2008-05-13T16:02:20-05:00 KATMAI BAY BREAKING ICE http://www.piersystem.com/go/doc/443/202135/ http://www.piersystem.com/go/doc/443/202135/ Icebreaking U.S. Coast Guard - 9th District 2008-05-13T16:01:56-05:00 Mackinaw Crew Measures Ice Thickness http://www.piersystem.com/go/doc/443/200968/ http://www.piersystem.com/go/doc/443/200968/ Icebreaking U.S. Coast Guard - 9th District 2008-05-02T15:54:49-05:00 BISCAYNE BAY ICE BREAKING http://www.piersystem.com/go/doc/443/200926/ http://www.piersystem.com/go/doc/443/200926/ Icebreaking U.S. Coast Guard - 9th District 2008-05-02T11:06:00-05:00 Bristol Bay Buoy Ops http://www.piersystem.com/go/doc/443/200922/ http://www.piersystem.com/go/doc/443/200922/ Icebreaking U.S. Coast Guard - 9th District 2008-05-02T10:54:17-05:00 Mackinaw takes a break from ice trials http://www.piersystem.com/go/doc/443/200901/ http://www.piersystem.com/go/doc/443/200901/ Icebreaking U.S. Coast Guard - 9th District 2008-05-02T08:09:24-05:00