Twenty-Six Defense Maritime Device / Instrument
AN/SSQ-36B Bathythermograph Sonobuoy
NATO A-size expendable bathythermograph profiling seawater temperature to 800 m for sonar propagation and acoustic range prediction.
Description
The SSQ-36B is a NATO A-size expendable bathythermograph manufactured for the U.S. Navy. A thermistor in the probe measures seawater temperature as it descends from the surface, and the data is sent by RF to the launch aircraft for display as temperature against depth. Crews use it to judge how local water temperature affects sonar propagation and acoustic range prediction.
Key features
- Profile depth 0-800 m (0-2625 ft); probe descent rate 1.5 m/s (5 ft/s)
- Sensor range 0 to 35°C with ±0.55°C accuracy
- 99-channel selectable RF transmitter (136.000-173.500 MHz), 0.25 W minimum
- Operating life 12 minutes maximum
Applications
- ASW mission planning and oceanographic research
Specifications
| Weight | 8.53 kg (18.8 lbs) |
|---|---|
| Profile depth | 0-800 m (0-2625 ft) |
| RF transmitter | 99 channels, 136.000-173.500 MHz |
| RF transmitter power output | 0.25 W minimum |
| Sensor temperature range | 0 to 35°C |
| Temperature accuracy | ±0.55°C |
| Probe descent rate | 1.5 m/s (5 ft/s) |
| Operating life | 12 min maximum |
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