Geo Acoustics – GeoScan 2491
New generation Side Scan Sonar GeoScan 2491 provides simultaneous dual frequency operation at 400 kHz & 900 kHz
The GeoScan 2491 is a simultaneous dual-band, broadband high-definition Side Scan Sonar designed for a diverse range of survey applications. Operating at 400 kHz and 900 kHz with a 60 kHz bandwidth, the GeoScan 2491 is designed for end-users that need the best image resolution.
The GeoScan 2491 uses ultra-short pulses and pulse compression technology for improved range resolution across track and image resolution. A dynamic variable aperture focusing system improves resolution at shorter ranges and quality at longer ranges, and an automated image equalisation system enhances contrast and definition.
The GeoScan 2491 contains an embedded pitch, roll & heading sensor, and a pressure sensor for depth measurement. Ideal for underwater infrastructure inspections, pipeline surveys, emergency response, archaeology, marine pasture assessments, and environmental monitoring, it delivers precise, high-resolution data in demanding conditions.
| KEY FEATURES | |
| Dual frequency operation: 400 kHz & 900 kHz for increased resolution | |
| 60 kHz update time | |
| CW and Chirp pulses | |
| No near-field blurring | |
| Superior terrain visualisation |
| APPLICATIONS | |
| Search & Recovery (SAR) | |
| Hydrographic surveys | |
| Object detection/identification | |
| Inspection & Engineering | |
| Marine Geology & Archaeology |
| TECHNICAL SPECIFICATIONS | |
| PERFORMANCE | |
| Working Frequency | 400 kHz / 900 kHz |
| Signal Bandwidth | 60 kHz |
| Max Slant Range | 150 m @400 kHz / 75 m @900 kHz |
| Horizontal Beam Width | 0.21° @400 kHz / 0.2° @900 kHz |
| Vertical Beam Width | 50° |
| Across Track Resolution | 1.25 cm @400 kHz / 1 cm @900 kHz |
| ALONG TRACK RESOLUTION | |
| 400 kHz: 0.18 m @50 m; 0.27 m @75 m; 0.37 m @100 m | |
| 900 kHz: 0.07 m @20 m; 0.17 m @50 m; 0.26 m @75 m | |
| SIGNAL & DEPTH | |
| Signal Type | CW / Chirp |
| Working Depth | 300 m |
| AUXILIARY SENSORS | |
| Pressure, roll, pitch & heading | |
| PHYSICAL & SYSTEM SPECIFICATIONS | |
| TOWFISH | |
| Size | 100 x 1200 mm |
| Weight | 25 kg (In Air) / 12 kg (In water) |
| SONAR INTERFACE MODULE | |
| Size | 208 x 127 x 66 mm |
| Weight | 1.6 kg |
| POWER & INTERFACE | |
| Power Supply | DC 20–36V |
| Power Consumption | 60 W |
| Cable Length | Standard 50 m (200 m Optional) |
| Data Interface | Ethernet Cable |
| TEMPERATURE | |
| Working Temperature | -2°C ~ 40°C |
| Storage Temperature | 20°C ~ 55°C |
| SOFTWARE | |
| DISPLAY & CONTROL SOFTWARE | |
| Supplied with GeoScan software for control and storage of sonar data | |
| THIRD PARTY COMPATIBILITY | |
| Export XTF format data to 3rd party applications |