View cart “Philippine Islands. Samar and Leyte. San Juanico Strait and Approaches. From the United States Government Surveys to 1935. With Additions and Corrections from the Philippine Gov’t. Charts to 1957. inset: 1) Northern Entrance to San Juanico Strait. From the United States Government Surveys of 1925. With Additions and Corrections from the Philippine Gov’t. Charts to 1957.” has been added to your cart.