| Surv Id | Format | Ngdc Id | Params | Create Date | Source Institution | Seq | ||
| 4 | B00224 | HYD93 | 03092049 | S | 1993011 | National Ocean Survey, N.O.A.A. | 01 |
| Country | Platform Name | Plat Type | Chief Hydrographer(s) | Seq |
| U.S.A. | Mt. Mitchell | 1SHIP | R.K.MATSUSHIGE | 02 |
| Project | Type of Survey | Strt Yr | End Yr | Scale of Survey | Seq |
| K545-MI-90 | EEZ Bathymetric Survey | 1990 | 1990 | 50,000 | 03 |
| Area (General) of Survey | Area (Specific) of Survey | Seq |
| LOUISIANNA | 197 NM SOUTH OF VERMILLION BAY, LA | 04 |
| Quality of Survey Description | Processing Status Description | Seq |
| 05 |
| Position Determination | Seq |
| STARFIX | 06 |
| Code | Horizontal Datum of Records | Code | Original Horizontal Datum | Seq |
| NOS31 | North American Datum 1983 | NOS31 | North American Datum 1983 | 07 |
| code | Vertical Datum | tide | Original Sounding Units | Seq |
| 04 | Mean Lower Low Water | meters | 08 |
| Sounding Method | Seq |
| SEABEAM GENERAL INSTRUMENTS UNKNOWN 16 Beams 12 KHZ | 09 |
| c | Sound Velocity Correction | Seq |
| 1 | Corrected, Vertical-cast Sound Velocity Table 90171-2241.VEL | 10 |
| Data Processing Methodology | Seq |
| NOS Pacific Hydro Section - standard SEABEAM processing | 11 |
| Format of Data Records | Top Lat | Bottom Lat | Left Lon | Right Lon | Seq |
| SURV,LAT,LON,VAL,TYP,CCODE(A8,F9.6,F10.6,F6.1,I1,I3) | +26.51 | +25.97 | -91.35 | -90.98 | 12 |
Additional Documentation |
Seq |
| This data is a subset of SEABEAM file. 5 Beams of actual data were extracted | 13 |
| from each return. Sampling rate varies from 10 to 30 seconds along track. | 14 |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 22 | |
| 23 | |
| 24 |
Note: You can find the comnplete HYD93 Format Specification, including all code descriptions, at www.ngdc.noaa.gov/mgg/dat/geodas/docs/hyd93.htm