lnp logoLNP LOGO
Home Archive
Room
Loch Ness
Book
Explore
Loch Ness
Adrian
Shine
Media
Field
Research
Young
Loch Ness Explorers
Reflections
& Links
Contact
Us
Loch Ness
Centre

ROSETTA Project Sediment Core Sampler

The acronym ROSETTA stands for Recovery Of Sediments Enabling Translation To Acoustics and was designed to complement a Loughborugh University seismic design study named REBECCA. The challenge was to design a machine capable of driving a core sampling tube at least 6m into the flat sediments in the centre of the 200m northern basin of Loch Ness.
Two drum-like suction anchors were lowered to the loch bed. Water was then pumped out, drawing them into the sediment and providing a firm base. Above the machine a one ton salvage lift bag, was inflated underwater, forcing the core barrel downwards past a piston by steel wires acting through pulley blocks mounted on the ‘trunnion’ towards the base of the machine and also within the barrel. The trunnion swivelled to allow the long core barrel to be brought to the horizontal for towing to station and retrieval. Compressed air was injected into the suction anchors to bring the apparatus to the surface.  
Two cores successfully penetrated to the 10,000 year old late glacial sediments in 1994 assisted by the SWATCH Loch Ness Submarine.  

 
Return to Equipment Index