| Project: | Tortuga Expedition |
| Instrument: | SeaBeam |
| All Bathy/Relief | Coastal | DEM Portal | Fishing | Global | Lakes | Multibeam | NOS |
| Ship Name: | Thomas Washington |
| Chief Scientist: | Orcutt, John A. Scripps Institution of Oceanography |
| Source Organization: | University of California, Scripps Institution of Oceanography (UC/SIO) |
| Start Date: | 1987-10-16 |
| End Date: | 1987-11-06 |
Multibeam Bathymetry

| Project: | Tortuga Expedition |
| Instrument: | SeaBeam |

| Number of Files: | 15 |
| Number of Records: | 261499 |
| BATHYMETRY DATA | Quantity | Percentage |
|---|---|---|
| Number of Beams | 4968481 | 100% |
| Number of Good Beams | 3178424 | 63.97% |
| Number of Zero Beams | 1790057 | 36.03% |
| Number of Flagged Beams | 0 | 0% |

| Total Time: | 485.0047 hours |
| Total Track Length: | 7711.5065 km |
| Average Speed: | 15.9 km/hr (8.5853 knots) |

| Northern Extent: | 32.113003 |
| Southern Extent: | 1.689079 |
| Western Extent: | -117.12433 |
| Eastern Extent: | -91.19071 |

| Minimum Sonar Depth | 0 | Maximum Sonar Depth | 0 |
| Minimum Altitude | 0 | Maximum Altitude | 6052 |
| Minimum Depth | 336 | Maximum Depth | 6076 |
File Information

| Files | File Size | Description |
|---|---|---|
| TUGA01WT.SBM.87nov01 | 2.21MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87nov03 | 2.40MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87nov05 | 2.60MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87nov06 | 1.17MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct18 | 1.78MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct20 | 2.47MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct22 | 2.72MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct24 | 2.43MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct25 | 2.37MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct28 | 2.21MB | SIO merge Sea Beam |
| TUGA01WT.SBM.87oct30 | 2.69MB | SIO merge Sea Beam |

| Files | File Size | Description |
|---|---|---|
| tuga01wt_fuledit.b93.mb164.gz | 20.09MB | NGDC binary hydrographic sounding format |

| Files | File Size | Description |
|---|---|---|
| TUGA01WT_Multibeam.xml | NCEI created ISO metadata |

| Files | File Size | Description |
|---|---|---|
| support.tar.gz | 1.21MB | Supporting data |
| svp.tar.gz | 50.5KB | Sound Speed Profiles (SSP or SVP) |