System and method for transmitting subsea parameters

A method for monitoring subsea parameters in a water column via a system, wherein the system comprises:

• a tether with a first end portion to be moored to a seabed;
• a variable buoyancy member connected to the tether at or near a second end of the tether;
• one or more sensor units for sensing one or more subsea parameters;
• and
• a control unit, the control unit including a communication member for receiving data from the sensor unit(s) and for transmitting said data wirelessly to a remote recipient, the variable buoyancy member being adapted to move the communication member between a submerged position and a surface position for a wireless transmittal of said data, and wherein the control unit is adapted to control the buoyancy of the variable buoyancy member;
• a non-variable buoyancy member connected at an upper portion of the tether, wherein:
• the submerged position of the communication member is below the non-variable buoyancy member;
• wherein the method comprises the steps of:
• mooring the first end portion of the tether to a seabed;
• sensing one or more subsea parameters with the sensors unit;
• receiving the data from the sensor unit(s) with the communication member;
• regulating the buoyancy of the variable buoyancy member via the control unit so as to bring the communication member to a surface position in the water column;
• and
• transmitting the data wirelessly to the remote recipient.