Data subscription type: Bottom Detection

The bottom detection data subscription string is BottomDetection.

Input

•

Type = The variant type as defined for certain programming languages

–

VT_BSTR = Text string

–

V_R8 = double, 8 bytes

–

VT_I4 = Integer 4 bytes

•

R/O = Read only

•

N/A = not applicable

•

If no value is provided in the XML input string, the example value in each table is used as default.

UpperDetectorLimit

Description	Range	Unit	Type	R/O
This is the Minimum Depth setting used for bottom detection.	<0,10000>	m	VT_R8	N/A
Example:	10

LowerDetectorLimit

Description	Range	Unit	Type	R/O
This is the Maximum Depth setting used for bottom detection.	<0,10000>	m	VT_R8	N/A
Example:	1000

BottomBackstep

Description	Range	Unit	Type	R/O
This is the Bottom Backstep setting for the channel.	<-100,10>	dB	VT_R8	N/A
Example:	-50

Output

struct StructBottomDepthHeader
  {
  DWORDLONG dlTime;
  };
struct StructBottomDepthData
  {
  double dBottomDepth; // (m) This is the detected bottom depth.
  double dReflectivity; // (dB) This is the seabed reflectivity. 
    If
the transducer faces upwards, use the surface reflectivity.
  double dVesselLogDistance; //  (nmi) This is the vessel’s
sailed distance.
  };
struct StructBottomDepth
  {
  StructBottomDepthHeader BottomDepthHeader;
  StructBottomDepthData BottomDepthData;
  };

Subscription string example

BottomDetection,

ChannelID=<ChannelID>,

UpperDetectorLimit=3.0,

LowerDetectorLimit=500.0,

BottomBackstep=-60.0