| Name | Description | Sunk | GPS |
| 60 ft steel | Tuesday (?) Sept 28, 1999 |
40°32.120′ -73°39.605′ |
|
| 40 ft steel dredge |
Thursday Sept 28, 2000 |
40°32.048′ -73°39.326′ |
|
| 40 ft steel dredge |
Thursday Sept 28, 2000 |
40°32.015′ -73°39.295′ |
|
| 37 ft steel crane |
2003 | 40°32.162' -73°39.481' |
Glass is a hard substance, usually brittle and transparent, composed chiefly of silicates and an alkali fused at high temperature.
Most glass is a mixture of silica obtained from beds of fine sand or from pulverized sandstone; an alkali to lower the melting point, usually a form of soda or, for finer glass, potash; lime as a stabilizer; and cullet ( waste glass ) to assist in melting the mixture. The properties of glass are varied by adding other substances, commonly in the form of oxides, e.g., lead, for brilliance and weight; boron, for thermal and electrical resistance; barium, to increase the refractive index, as in optical glass; cerium, to absorb infrared rays; metallic oxides, to impart color; and manganese, for decolorizing.
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