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Exploring the seabed by Parametric, Sub Bottom Profiler

Exploring the seabed by Parametric, Sub Bottom Profiler

Kongsberg Maritime will provide this survey and positioning system free of charge for the Hafrsfjord project including personnel for operation of the equipment! This makes Kongsberg Maritime one of our very important collaboration partners in our quest for signals indicating artifacts from the Battle of Hafrsfjord. Kongsberg will install their equipment on board the light survey vessel Freya provided by Northern Research Shipping. This introduction of additional survey equipment makes it possible for the project team to modify plans and perform the overall survey in two stages. First a wider survey to search for larger objects and indications on location for battle site. Thereafter a detailed survey can be conducted in the interesting areas of the fjord.

TOPAS 120

The TOPAS PS 120 sub-bottom profiler is a  portable system designed for very high resolution, shallow depth – between 3 and 400 meter operation. Kongsberg maritime will provide this system for the Hafrsfjord project including personnel for operation of the equipment. This makes Kongsberg Maritime one of our very important collaboration partners in our quest for signals indicating artifacts from the Battle of Hafrsfjord.

The TOPAS parametric sub-bottom profiler family are based on low frequency sound generation due to non-linear interaction in the water column from two high intensity sound beams at higher frequencies. The resulting signal has a high relative bandwidth (~80%), narrow beam profile (close to the transmitted high frequency signals) and no side lobes. All these features results in very high spatial resolution in the sediment profiles. The narrow beam also results in lower received reverberation levels and thus higher penetration.

For more information, see https://www.km.kongsberg.com/ks/web/nokbg0240.nsf/AllWeb/750790F28DC4EE08C1256A690024C8CE?OpenDocument and https://www.km.kongsberg.com/ks/web/nokbg0397.nsf/AllWeb/EFF0D9DDF5DB1D6BC1257CE5003196EA/$file/Application_Note_EM-2040.pdf?OpenElement

Seapath 134

The Seapath position, attitude, time & heading sensors offers the advantages of gyro-compass, GPS and vertical reference technologies in a single, robust system. 

Further information on the Seapath family of equipment cab be found at the following link https://www.km.kongsberg.com/ks/web/nokbg0397.nsf/AllWeb/6360CFA186C9D3A7C12581800042B9A2/$file/seapath_family_mar2017.pdf?OpenElement

PulSAR

PulSAR Side-Scan Sonar acquires high resolution acoustic images of the seabed by using a rugged tow fish that can easily be operated using our water protected deck unit and a small cable hand reel, portable electric winch also available. Very large areas can be surveyed efficiently revealing small objects and structures in great detail. The system is ideal for search and recovery operations, underwater inspection as well as engineering and scientific surveys.

 

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