| Sensors | High Tech HTI-90-U hydrophone (0.05 Hz - 15.5 kHz) or Cox/Webb DPG (50 mHz - 20 Hz); high or low gain electric fields systems; EMI BF-4 magnetic sensors |
| Anti-aliasing filters | 8-pole Butterworth from Frequency Devices |
| A/D | 16 bits plus dynamic gain ranging; recently operated with 24 bit A/D - to become standard |
| # of channels | 1 - 16 |
| Dynamic Range | 162 dB with gain ranging; 144 dB with 24-bit A/D |
| Sampling Interval | 25 - 2000 samples/s; # channels x sample rate < 4000 |
| Timing Control | Seascan clock with an accuracy of 5x10^-8 correctable for drift to 0.1 s/yr |
| Instrument location accuracy | 10 m or less using acoustic transponder or water wave recordings following active experiment |
| Data acquisition mode | Continuous recording including period when data being written to disk. |
| Recording capacity | With a pair of new 16 GB drives and data compression: 64 GB |
| Power source | Lithium oxyhalide D or DD cells |
| Duration | 1 yr at 125 samples/s (1 channel) |
| Pressure case | 7075 Al 7" OD/ 5.75" ID pressure case with lengths of 28" or 36" depending upon experiment length; Pressure case for acoustic release is 4.75" OD, 16" long |
| Weight | 70 kg in air; 15 kg in water; 45 kg after recovery; MT instrument weights 114 kg in air |
| Flotation | Three to five 12" glass spheres |
| Maximum depth of deployment | 7350 m (6000m deepest to date) |
| Method of instrument recovery | Acoustic release using Deaton/SIO burn-wire system |
| Acoustic Commands | Disable, enable, release1, and release 2 |
| Recovery Aids | External radio beacon and strobe (optional) |