
| Seismometer | Mark Products L-28 4.5 Hz vertical-component seismometer mounted in separate pressure case. Gimbals will level seismometer if tilt <40°. |
| Pressure Sensor | HiTech crystal hydrophone with low-frequency corner at 5 Hz. |
| Digitizer | Quanterra QA330 24-bit A/D. Dynamic range: 135 dB. Data compression. Sample rates: 1-200 Hz. |
| Clock | Seascan PrecisionTimebase. Drift rate is 3-5 x 10-8 (<0.5 ms drift a day before correction). |
| Disk Capacity | 9 GByte Hard disk |
| Data Offload | Glass ball need not be opened. Transfer rates of at least 1 MByte/s . |
| Battery Pack | Batteries are stored in separate 12" glass ball. |
| Recording Duration. | Alkaline battery pack will deliver sufficient power for 60 days. Lithium battery pack will allow 6 month operation. |
| Weight | 160/110 lbs with/without anchor |
| Pressure Case | 17" and 12" glass ball |
| Release | Single burnwire operated acoustically |
| Dimensions | 44" high x 22" wide |
| Power | 1 W for 2 channels at 200 samples/sec and duty-cycled disk |