Appendix A: Standard Data Available in the Alvin Data System
| Raw Data - Time Information | |||
| Datum | Units | Accuracy | Resolution |
| Time in HHMMSS format | local | 10-8 sec/day | 1 sec |
| Date in YYDDMM format | local | -- | 1 day |
| Time in seconds since 1/1/1970 00:00:00 GMT (valid through year 2037) | sec (GMT) | 10-8/day | 1 sec |
| Time zone adjustment (GMT=Local+TZA) | sec | -- | 1 sec |
| Alvin dive number | -- | -- | -- |
Raw Data - Scientific Data | |||
| Datum | Units | Accuracy | Resolution |
| Precision depth | meters | 1 m | 0.1 m |
| Backup depth | meters | 5 m | 0.1 m |
| Non-precision(strain gauge) depth | meters | 22 m | 0.1 m |
| Altitude, 0-50 m range | meters | 1 m | 0.1 m |
| Hdg relative to true north | degrees | 1.5 deg | 0.1 deg |
| Low water temperature, 0-20C (one or more probes) | deg C | 0.5 deg | 0.001 deg |
| High water temperature, 30-800C (none to several probes) | deg C | 5 deg | 0.1 deg |
| User frequency counters (10) | 0-65535 counts/second | -- | -- |
| User event counters (3) | 0-65535 counts | -- | -- |
| Pitch attitude | deg | 0.5 deg | 0.001 deg |
| Roll attitude | deg | 0.5 deg | 0.001 deg |
Raw Data - Acoustic Navigation Data | |||
| Datum | Units | Accuracy | Resolution |
| Interrogation freq (Tx) | KHz | .005 KHz | 0.1 KHz |
| Tracking freq (Tx) | KHz | .005 KHz | 0.1 KHz |
| LBL receive freqs (4) | KHz | .005 KHz | 0.1 KHz |
| LBL 2-way travel times (4) | sec | 2 msec | 0.1 msec |
| Nav xcvr operating mode | (various) | -- | -- |
Raw Data - Alvin Operating Data | |||
| Datum | Units | Accuracy | Resolution |
| Hydraulic system pressure | psi | 10 psi | 0.1 psi |
| Ballast air pressure | psi | 120 psi | 0.1 psi |
| Variable ballast temp | deg C | 0.5 deg | 0.1 deg |
| Variable ballast pressure | psi | 25 psi | 0.1 psi |
Computed Data - Scientific Data | |||
| Datum | Units | Accuracy | Resolution |
| Median altitude | meters | 1 m | 0.1 m |
| Vertical rate | m/min | -- | -- |
Computed Data - Acoustic Navigation Data | |||
| Datum | Units | Accuracy | Resolution |
| X position in net | meters | 1-10 m | -- |
| Y position in net | meters | 1-10 m | -- |
| Latitude/longitude | deg, min | -- | 0.0001 min |
| Target bearing | deg | -- | -- |
| Target range | meters | -- | -- |
| Target X | meters | -- | -- |
| Target Y | meters | -- | -- |
| Target # | meters | -- | -- |
| Horizontal rate | m/min | -- | -- |
Computed Data - Alvin Operating Data | |||
| Datum | Units | Accuracy | Resolution |
| Variable ballast weight | pounds | 20 lbs | -- |
| Variable ballast rate | lbs/min | -- | -- |