  H10990/01-- OPR-A397-WH; SIDE SCAN SONAR CONTACT. SWMB LD OF 39 FEET (11.94 METERS) IN LAT. 42-21-41.94N, LONG. 71-02-36.15W. DIVERS DESCRIBE A BLOCK OF RAILROAD TIES LACED (SIC) TOGETHER AS WELL AS OTHER METAL DEBRIS. LD OBTAINED ON A BROKEN RAILROAD