CVS-841/851
Chapter 7
Functional Registration
7.2.3.1 BTM/NORM display
This mode of image is a combination of normal and BTM (Bottom Zoom) images. In the BTM image,
the seabed echo is shown flat and fixed to the bottom of the screen with fish echoes shown within the
depth specified by the user.
Zoom range bar (Orange)
The seabed echo
Specified depth
1 4 : 2 2 : 5 6
2002/04 (Wed)
0 0
0
0
Shift
Image Speed 1/1
5 0
1 0 0
1 5 0
2 0 0
150
Nor
5 0
0
ZM
BTM image
Normal image
Figure 7.10 BTM/NORM display screen layout
7.2.3.2 BD/NORM display
This mode of image is a combination of normal and BD (Bottom Discrimination) images. In the BD
image, the seabed image is shown flat with its upper and lower parts shown at a specified depth. The
fish echoes are shown within the range set up by the user.
1 4 : 2 2 : 5 6
Zoom range bar (Orange)
2002/09/04(Wed)
0 0
0
0
Shift
Image Speed 1/1
ZM
5 0
1 0 0
1 5 0
2 0 0
1 5 0
No
r
5 0
0
5 0
1 0 0
1
1
0
0
0
0
0
Seabed
Zoomed range
BD image
Normal image
Figure 7.11 BD/NORM image
7.2.3.3 ZOOM/NORM image
This mode of image is a combination of normal and ZOOM (Referenced zoom) images. The ZOOM
image shows a zoomed image of a certain depth range specified by the user, referenced to the depth
set by the green VRM.
Zoom range bar
(Orange)
Starting depth set by
the VRM (Green)
Zoomed depth range
高
14:22:56
2002/09/04 (Wed)
0 0
0
0
Shift
Image Speed 1/1
ZM
5 0
1 0 0
1 5 0
2 0 0
1 5 0
Nor
1 0 0
1 5 0
5
5
0
0
5 0
Figure 7.12 ZOOM/NORM image
ZOOM image
Normal image
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