MSI has recently completed a deepwater current measurement programme with P.T. Calmarine (PTC) off Sulawesi, Eastern Indonesia from their survey vessel Ocean Rajawali. The scope of work called for current measurements at two locations, with subsequent data quality control, processing and extreme value analysis in order to present preliminary design criteria for current speed modelling.

Current measurements were collected throughout the water column at both locations using a combination of RD Instruments 300kHz and 75kHz Acoustic Doppler Current Profilers (ADCPs). The instruments were mounted on the vessel using over-the-side pole mounts and cabled to personal computers running RD Instruments software. Vessel heading was input to the software from a gyrocompass and positional data from the vessels Cnav DGPS system. The navigation data was used to complement the data collected by the ADCP for the motion of the vessel.

An important facet of this project was the familiarization of PTC personnel in this downward-looking Doppler operational mode of the ADCPs and associated software in a deepwater environment.

For more information on this or other projects conducted by MSI, please contact us.