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Mechanical and Ocean Solutions

Seabed Sediment Measurement System (SSMS)

ISSAMS (In Situ Sediment Geoacoustic Measurement System) was originally designed for ocean floor research conducted by the Naval Research Laboratory at Stennis SpaceCenter, MS, and was used to rapidly measure the geotechnical and geoacoustic properties of the ocean floor by measuring compressional and shear wave velocity and attenuation, temperature, depth, and near bottom water conductivity. Ocean floor geotechnical and geoacoustic properties are needed for numerous scientific and military applications. SSMS (Seabed Sediment Measurement System) is an updated version of ISSAMS, but is functionally similar. Modifications include more efficient 'Inner Frame Guides', less complicated 'Lifting Frame', lighter weight, and smaller overall dimensions.


SSMS is first lowered to the ocean floor. A hydraulic cylinder is then activated which lowers an inner cage and inserts shear and compression wave sensing probes into the ocean floor. After the data has been recorded, the hydraulic cylinder is reversed, the inner cage raises and the shear and compression probes are retracted, and SSMS is recovered.


Seabed Sediment Measurement System

ISSAMS Construction

ISSAMS was designed by Carl Jackson, P.E. for the Geo- Acoustics section at the Naval Research Laboratory, Stennis Space Center, MS.

It is used for situ measurements for predications of seaflor geo- acoustic properties.

Sea Technology Magazine

Click on the Naval Research Laboratory image below to see an artile about ISSAMS published in Sea Technology magazine.