GunLink 4000
New generation hydrophone monitoring and source control systems
The system provides in-water firing control and sensor timing monitoring of up to 256 standard guns (128 GI guns) and is capable of receiving hydrophone data from up to 512 near field phones. The GunLink 4000 moves the system electronics in to the water allowing it to be mounted close to the gun array, thus reducing umbilical diameters, increasing umbilical lengths and allowing shorter offsets.
Seamap
Netherlands
Description
The GunLink 4000 is the third phase of Seamap’s range of new generation hydrophone monitoring and source control systems.
The GunLink 4000 comprises of a Host Computer and Timing Control Unit (TCU), an Umbilical Termination Module (UTM) for each umbilical and a Gun Firing & Sensing Module (GFSM) for each one or two gun cluster. The GFSM also incorporates a depth sensor, a pressure sensor and a connector for an external hydrophone. Seamap Calibrated Hydrophones are fully supported. The GFSM’s are daisy chained along the array starting from the UTM with only a single cable between each module thus reducing the complexity of the array wiring.
Individual gun fire times and solenoid coil current logging enables the firing pulse to be fed to each gun solenoid at the calculated time for a programmable period and voltage. The in-water circuitry allows each near field phone and firing sensor to be monitored continuously using a 24 bit A/D converter sampling at 0.1mS thus providing increased gun firing accuracy and auto-fire detection. The Host Computer runs the main operating and control software under the LINUX operating system and provides the main system control and display functions. The software has been designed to be both intuitive and simple to use, providing the operator with real time data and easily recognizable indications of deteriorating gun performance.
