System Architecture: Teledyne TSS Meridian Surveyor Gyro
The Teledyne TSS Meridian Surveyor is the high-precision hydrographic and offshore survey variant of the renowned Meridian gyrocompass family. Specifically designed for hydrographic survey craft, seismic exploration marine-equipment-offshore-vessel-rig/” class=”seanav-internal-link”>vessels, ROV support ships, cable layers, and high-specification dynamic positioning (DP) vessels, the Meridian Surveyor provides enhanced heading precision (< 0.2° secant latitude dynamic) combined with high-update-rate data streams.
Featuring a hand-selected, ultra-low-drift Dynamically Tuned Gyroscope (DTG) sensor core and high-bandwidth output telemetry, the Meridian Surveyor outputs uncorrupted heading and angular rate data at up to 50 Hz, perfectly synchronizing multibeam sonars, subsea acoustic tracking systems (USBL), and DP controllers.
Technical Specifications: Meridian Surveyor
| Parameter | Specification Details |
|---|---|
| Application Grade | High-Precision Hydrographic Survey & Offshore Dynamic Positioning |
| Sensor Core | Ultra-low-drift Dynamically Tuned Gyroscope (DTG) dry sensor element |
| Settle Time | < 40 minutes from cold start |
| Static Accuracy | ≤ 0.05° secant latitude |
| Dynamic Accuracy | ≤ 0.2° secant latitude under heavy survey sea conditions |
| Heading Resolution | 0.01° digital display and data stream resolution |
| Telemetry Update Rate | Configurable up to 50 Hz continuous serial transmission |
| Data Interfaces | 4x RS-422 / RS-232 serial channels ($HEHDT, $HEROT, TSS1 format), Step, Synchro |
| Operating Voltage | 24 V DC (18–36 V DC) nominal; 115/230 V AC auto-switch dual supply |
| Certifications | IMO A.424(XI), MSC.116(73), Wheelmark MED, Hydrographic Survey Grade |
Core Modules, PCBs & Replacement Spare Parts
| Module | Part Reference | Technical Details |
|---|---|---|
| Surveyor DTG Sensor Assembly | TSS-SRV-SEN-MOD | Selected high-accuracy DTG core with precision pre-amplifiers |
| Survey Processor Board (DSP) | TSS-SRV-PCB-CPU | High-speed DSP card executing 50 Hz heading and rate-of-turn math |
| Front Panel Display / CDU | TSS-SRV-DSP-01 | Local heading and status interface with sub-menu configuration |
| Power Conditioning PCB | TSS-SRV-PCB-PWR | Low-noise DC power supply with isolated grounds for survey acoustic quietness |
| High-Rate Serial Interface Board | TSS-SRV-PCB-COM | Multi-port RS-422 / RS-232 driver feeding multibeam sonars and DP desks |
| Precision Shock Damper Set | TSS-SRV-DAMP-KIT | Tuned anti-vibration mounts preventing engine harmonic distortion |
Seanav Hydrographic Survey Field Engineering
Seanav Marine supports offshore survey operators, dredging contractors, and DP vessel fleets worldwide:
- Survey Sensor Calibrations: Interfacing and zeroing heading outputs into Kongsberg EM, Reson SeaBat, or Norbit multibeam sounders.
- Dynamic Rate Table Verification: Validating 0.01° repeatability, latency, and step response on our certified 3-axis motion simulation bench.
- Acoustic Noise Diagnostics: Ensuring power supply filtering prevents ground-loop interference into shipboard USBL transducers and sub-bottom profilers.
- DP System Integration Testing: Interfacing dual Meridian Surveyor outputs to DP-2/DP-3 heading voting networks.
