01-25-2012, 10:16 AM
Page 30, Note 2: If bridge is long and current is strong, upstream anchors ( one per hinge raft and float assembly ) are used instead of the upstream anchor cable, and are cast from the assault boat by the upstream anchor section.
http://digital.library.unt.edu/ark:/67531/metadc29951/m1/1/
I looked for that FM the other day online and all I found was where you could buy them. Funny that it should be found in the University of North Texas library online as that is a) the college from which I graduated, and 
I was on their site yesterday! Incidentally, the name of the univeristy was changed in the early 90's to UNT from North Texas State University which explains the NTSU stamped on the front cover.