Echo Sounder Clause Samples
The Echo Sounder clause defines the requirements and responsibilities related to the use and maintenance of echo sounding equipment on a vessel. Typically, this clause specifies that the vessel must be equipped with a functioning echo sounder to measure water depth and that the crew must regularly monitor and record depth readings, especially when navigating in shallow or unfamiliar waters. By establishing these obligations, the clause helps prevent groundings and ensures navigational safety, thereby reducing the risk of accidents and potential damage to the vessel.
Echo Sounder. The digital echo sounder for hydrographic surveys shall in principle be operated in the 210 kilo Hertz range (narrow beam transducer). It shall not be permitted for any reason to use a lower operational frequency of the echo sounder for the Post-dredging survey than that has been used for the Pre-dredging survey. The digital echo sounder shall have an accuracy up to 0.1 m. At the start of each hydrographic survey, the AHSS is to be calibrated to the specified accuracy. To this effect, the Contractor shall establish a fixed point (or fixed points) with known coordinates such that the survey boat can easily be positioned with the transducer of the echo-sounder always in the same position relative to the calibration point.
Echo Sounder. Quantity 1 Make JRC Model JFE - 680 Located at: Bridge NAV Chart Desk Recorder: yes/no Yes Changeover Echosounder : JRC,NQE-929
Echo Sounder. The Lessee must employ either a hull mounted, high-frequency, narrow beam hydrographic echo sounder or multibeam bathymetry to obtain bathymetric data. The Lessee must ensure that the data is displayed on a graphic recorder and is logged digitally and continuously. The Lessee must ensure that the echo sounder records with a sweep appropriate to the range of water depths expected in the survey area. The Lessee must use a heave compensator in conjunction with the echo sounder system to remove the effects of vessel movement from the data. The Lessee must ensure that water column sound velocity is calibrated at the start and end of the survey with a conductivity temperature depth (CTD) sensor or velocity probe capable of recording in the maximum water depth expected in the survey area.