struct StructVelocity
  {
  StructVelocityHeader VelocityHeader;
  StructVelocityData VelocityData;
  };

struct StructVelocityHeader
  {
  double range;
  double rangeStart;
  double BottomDepth; // (m) This is the detected bottom depth.
  int errorCode; // (dB) Defined error codes
  };

struct StructVelocityData
  {
  int numValidVelocities;
  StructVelocityVectorHcs Velocities[2500];
  };

struct StructVelocityVectorHcs
  {
  float x; // (m) Velocity measured in x, y, z direction relative to the vessel.
  float y;
  float z;
  };