iWBMSh STX
Norbit iWBMSh STX
iWBMSh STX
Electronic scanning for structure inspection
iWBMSh STX combines OceanMaster navigation with electronic scanning capability. Quay piles, bridge foundations and underwater structures can be observed from different viewing geometries. Repeat measurements can support change assessment. STX scanning and conventional bathymetric lines are different acquisition arrangements; position quality, acoustic shadowing and motion correction remain important to the results.
Survey workflow and quality control
Before mobilisation, the coordinate system, vertical reference, antenna offsets and sonar mounting geometry are defined. Sound-speed profiles, time synchronisation and angular alignment are checked during trial lines. Sonar observations are assessed alongside position and motion data, with overlapping lines and cross lines used to check consistency.
Deliverables can include a bathymetric surface, sections, a seabed model for volume calculations or structure inspection data, depending on the application. Acoustic resolution alone does not represent final georeferenced survey accuracy. Water depth, seabed material, vessel motion and selected software options are considered together when specifying the system.
Technical specifications
| GNSS/INS | Applanix OceanMaster |
|---|---|
| Frequency | 400 kHz nominal; 200–700 kHz |
| Swath sector | 5–210° |
| Ping rate | Up to 60 Hz |
| Housing depth rating | 100 m |
| Interface | Ethernet |
| Acoustic depth range | 0.2–275 m; typical 160 m |
| Beam width | 0.9° × 0.9° @ 400 kHz; 0.5° × 0.5° @ 700 kHz |
| Beam count | 256–512 |
| Range resolution | <10 mm; 80 kHz bandwidth |
| Roll / pitch / heading | 0.01° / 0.01° / 0.02°; heading at 2 m antenna separation, RTK |
| Power | 70 W |
Specifications follow the original manufacturer brochure PS-170005-7. Acoustic range is distinct from housing depth rating. Options and operating conditions affect achievable performance.
The technical reference for this model is the existing original brochure revision. Current hardware options and availability should be confirmed for the project.