RV Investigator has various acoustic systems for scientific research including two mulltibeam echosounder systems permanently onboard: one designed for deep water and one for shallow to mid depth water.
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Technical details
Kongsberg EM122
Full ocean depth multibeam echosounder (MBES) used primarily for bathymetry and bottom characterisation.
Operating frequency is 12 kHz.
Number of beams is 288.
Horizontal resolution is 1 x 1 degree.
Maximum width is 6 times water depth or 30 km or 143 degrees.
Depth range is 50-11,500 m.
Kongsberg EM710
Shallow to mid depth (maximum 2000m) multibeam echosounder used primarily for bathymetry and bottom characterisation.
Operating frequencies are 70-100 kHz.
Number of beams is 400.
Horizontal resolution is 0.5 x 1 degree.
Maximum width is 5.5timesx water depth or 2300 m or 140 degrees.
Depth range is 3–2000 m, with optimum depth range 600-700 m.
SBP120
Sub-bottom profiler to resolve sediment layers and buried objects.
Operating frequencies are 2 – 8 kHz and 12kHz.
Horizontal resolution is 3 x 3 degrees.
Seafloor penetration depends on sediment type but extends up to tens of metres.
12kHz transducer
Single beam bathymetry and underwater communications such as acoustic releasers and pingers.
Operating frequency is 12 kHz.
75kHz ADCP
Deep (to 700m) current profiler.
150kHz ADCP
Mid-depth (to 400m) current profiler
ITI Net Monitoring System
Trawl net monitoring.
Linked to the SH90 for targeted trawling.
USBL
Provides location of deployed instruments relative to the ship.
Dual Axis Doppler Log
Speed and direction of the ship relative to the water.
Sound Velocity Probe
Measures sound velocity in water at the depth of transducers and is used in multibeam beam forming.
Hydrophones
Four hull mounted hydrophones provide capability for ship self noise and underwater acoustics monitoring.
Technical details
Bathymetry imaging showing the wreck of SS Macumba, with damage to the ship hull, lying on the seafloor.
Kongsberg EM122
Full ocean depth multibeam echosounder (MBES) used primarily for bathymetry and bottom characterisation.
Operating frequency is 12 kHz.
Number of beams is 288.
Horizontal resolution is 1 x 1 degree.
Maximum width is 6 times water depth or 30 km or 143 degrees.
Depth range is 50-11,500 m.
Kongsberg EM710
Shallow to mid depth (maximum 2000m) multibeam echosounder used primarily for bathymetry and bottom characterisation.
Operating frequencies are 70-100 kHz.
Number of beams is 400.
Horizontal resolution is 0.5 x 1 degree.
Maximum width is 5.5timesx water depth or 2300 m or 140 degrees.
Depth range is 3–2000 m, with optimum depth range 600-700 m.
SBP120
Sub-bottom profiler to resolve sediment layers and buried objects.
Operating frequencies are 2 – 8 kHz and 12kHz.
Horizontal resolution is 3 x 3 degrees.
Seafloor penetration depends on sediment type but extends up to tens of metres.
12kHz transducer
Single beam bathymetry and underwater communications such as acoustic releasers and pingers.
Operating frequency is 12 kHz.
75kHz ADCP
Deep (to 700m) current profiler.
150kHz ADCP
Mid-depth (to 400m) current profiler
ITI Net Monitoring System
Trawl net monitoring.
Linked to the SH90 for targeted trawling.
USBL
Provides location of deployed instruments relative to the ship.
Dual Axis Doppler Log
Speed and direction of the ship relative to the water.
Sound Velocity Probe
Measures sound velocity in water at the depth of transducers and is used in multibeam beam forming.
Hydrophones
Four hull mounted hydrophones provide capability for ship self noise and underwater acoustics monitoring.
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