Device, system and method for collecting samples from a bed of a waterbody

A system for collecting samples from a bed of a waterbody comprising:

• a vessel, comprising a lifting an lowering unit having a cable attached to a device;
• and
• the device comprising:
• a control unit to be positioned in a remote position;
• a top lift unit attached to a lifting and lowering unit of a vessel via a cable, such that the top lift unit can be lifted and lowered relative to the bed of the waterbody;
• a corer unit releasable attached to the top lift unit by a fixation unit and arranged for being at least partly driven into layers of the bed of the waterbody to collect the samples from the bed, when released from the top lift unit;
• a depth stabilizer configured to keep the corer unit and top lift unit stable in a vertical direction when they are attached and to level the top lift unit after the corer unit is released from the top lift unit, and
• wherein the top lift unit comprises a positioning unit bi-directionally communicating with the control unit for controlling the position of the corer unit.

A method for collecting samples from a bed of a waterbody by use of a device, the method comprising:

• lowering a top lift unit and a corer unit of the device in the waterbody by use of a lifting and lowering unit, the top lift unit is connected to via a cable, wherein the corer unit is attached to the top lift unit;
• positioning the top lift unit in a desired corer release position in a vicinity of the bed of the waterbody by use of a positioning unit bi-directionally communicating with a control unit and keeping the corer unit and top lift unit stable in a vertical direction by using a depth stabilizer;
• releasing the corer unit from the top lift unit by activating a release mechanism so that it is at least partly driven into layers of the bed of the waterbody while leveling the top lift unit after the corer unit is released from the top lift unit;
• collecting samples from the layers of the bed of the waterbody;
• and
• pulling the corer unit out of the bed of the waterbody and lifting it back to a vessel.