. Commercial fisheries review. Fisheries; Fish trade. OCEANOGRAPHY 11 Bathymetric Map of Sea Bottom Off New England Being Prepared The most detailed bathymetric map of the sea bottom off New England is being compiled by cartographers of ESSA's Coast and Geo- detic Survey (CGS). It will include the floor of Boston }8L0CK ISLAND The map will cover 6,800 square statute miles of ocean bottom extending from Cape Cod, Mass., to Portland, Maine, and up to 53 miles seaward off Boston. One of Series It is one of a series planned by CGS for the Continental Shelf, an area about 862,000 square st
. Commercial fisheries review. Fisheries; Fish trade. OCEANOGRAPHY 11 Bathymetric Map of Sea Bottom Off New England Being Prepared The most detailed bathymetric map of the sea bottom off New England is being compiled by cartographers of ESSA's Coast and Geo- detic Survey (CGS). It will include the floor of Boston }8L0CK ISLAND The map will cover 6,800 square statute miles of ocean bottom extending from Cape Cod, Mass., to Portland, Maine, and up to 53 miles seaward off Boston. One of Series It is one of a series planned by CGS for the Continental Shelf, an area about 862,000 square statute miles of submerged land off the U. S. The maps are designed to aid Fed- eral, state, and industrial interests explore and develop the area's resources. Their eco- nomic development depends heavily on ade- quate sea bottom maps; few exist at present. 100 Surveys of Area The mapping, which will take several months to complete, portrays the sea bottom at 5-meter (17-foot) intervals. The cartog- raphers use depth data represented in more than 100 hydrographic surveys of the area conducted by the ESSA agency over 114 years. The map is expected to be released within a year. Depths shown will range from a few feet off the coast to over 600 feet about 53 miles east of Boston. The bottom of Boston Harbor will be shown in detail for the first time. The map will cover the area from Cape Cod, Mass., to Portland, Me., and up to 53 miles seaward off Boston. Seek Underwater Obstructions to Delaware Bay The Coast and Geodetic Survey has begun a two-month search for hazards to navigation in the approaches and entrance to Delaware Bay. The w i r e drag ve s s e 1 s "Rude" and "Heck," working as a team, will probe for sunken wrecks and other pinnacle-like ob- structions in the heavily traveled sea lanes leading into the Bay. Methods The vessels will first sweep the anchor- age area inside the Bay entrance, with a sub- merged wire towed between them, and then sweep the ap
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