"STEEL PLATE,60 IN. LG,18 IN. W,3/8 IN. THK,W/2 ROUND HOLES 7 IN.DIA,LOCATED ON 10 IN. CENTER FROM EACH END AND 7-1/2 IN. CENTER ALONG ONESIDE,W/ONE RECTANGULAR HOLE 4 IN. BY 10 IN. LG,ON 1 FT 8 IN. CENTER FROMTHE 7 IN. DIA HOLES,DESIGNED FOR REINFORCING DOUBLE BITT ON P-SERIESPONTOON GEAR,NAVFAC DWG NO. 889764,MARK NO. P15"