StarFish 453OEM
System Manual
15
4.7.
Example Side-Scan Sonar Images
Lake Bed
Scan showing boat moorings at the bottom (concrete
blocks in craters of silt).
The dark area on the left channel is the shoreline.
A boat with wake is visible on the right.
At the top of the right channel, it can be seen that the
bottom has a rockier texture, and appears brighter
than the silt in the rest of the image.
Cable Car Ferry
Lake bed beneath a cable-hauled car ferry.
The two cables are visible above the bottom, crossing
beneath the sonar.
The movement of the cables has exposed the bedrock
of the lake, causing a brighter reflection.
The grooves are visible on the centre profile on the
lakebed, and the shore and slip-way are visible in the
top left.
Marina
Shallow water with moored boats. The bright white
targets of the hulls are visible, above “craters” in the
silt, caused by the movement of the mooring cables.
Note the large acoustic shadow on the left channel,
caused by a raised area of the seabed being almost
level with the sonar in the shallow water.
Coral Reef
Horizontal image orientation showing a scan over
coral reefs.
At the extreme right of this image, ripples in the sand
are visible, while each coral outcrop has clearly visible
shadows.
Note how close the sonar came to a small outcrop at
the centre of the image!
