Overview

The Type 8305 AMT is a long-endurance Compatt 6 based transponder that is extensively used for subsea survey tasks and is capable of autonomously acquiring acoustic ranges and sensor data without surface control. The data is time-stamped and logged internally for recovery via the integrated high-speed acoustic telemetry modem. This autonomy allows measurements to be made over a long period of time without requiring a surface vessel or ROV to command the process. This enables new applications that save vessel and survey time so reducing cost and risk.

Precision pressure, temp, sound velocity and dual-axis inclinometer sensors are integrated and are intelligently powered up at the requested time and sampling period, providing an ultra-low power platform for up to three years deployment. Sampling regimes can be re-programmed and recovery of all data can be achieved via the acoustic telemetry link.

The AMT has many of the same acoustic functions as Compatt 6. It operates in the Medium Frequency (MF) band and is fully Sonardyne Wideband® 2 compatible.

The AMT is available with a range of omni and directional transducers, depth ratings and pressure housings dependent on deployment duration and application. Additional external sensors can be easily integrated via the power and communications port.

Typical Applications

Metocean platform: Subsea acquisition of current profile, temperature, sound velocity and tidal height record

AUV survey and metrology reference, acoustic position reference, SV and tidal height correction station

Pipeline buckle monitoring

Structure settlement monitoring

Key Features

Autonomous operation: acquires acoustic ranges & sensor data without surface command

Integrated precision sensors: pressure, temp, SV, inclinometers

Options for external sensors: current meters etc.

Easy to set-up with configuration and sampling period programmable via telemetry link

Integrated high speed modem functions

Sonardyne Wideband compatible navigation functions

3 year deployment battery life: Alkaline and lithium battery options

HiPAP®  and USBL compatible

Depth rated to 3000 Metres: (Options for 5000 Metres and 7000 Metres)

Aluminium bronze or hard-anodised aluminium housing options

Integrated release mechanism option

Technical Specifications

*Dependant on fitted sensor **Depends on knowledge of sound speed