JW Fishers SSS-100K PC Operation And Maintenance Manual page 73

Hull Bottom Left
In this position, the left 600K transducer is at a +10 degrees from the horizon. This is the position that is
used for scanning the bottom of a boat on the left side of the fish. The PC is set up to display left channel
only; the right transducer output is ignored. The recommended Range setting on the PC is 10 m. The fish is
towed 1-2 m below the bottom of the boat hull. In most cases, two passes along the length of the boat hull
is required, one pass along one side of the hull and a pass going the other direction along the other side.
Vertical Right
In this position, the right 600K transducer is at a -80 degrees from the horizon. This is the position that is
used for scanning a vertical wall on the right side of the fish. The PC is set up to display right channel only;
the left transducer output is ignored. The recommended Range setting on the PC is 10 m. The fish is towed
1-2 m from the face of the wall. In most cases, the fish is just below the surface and is towed along the
length of the wall.
Right Transducer at -80 deg
Vertical Left
In this position, the left 600K transducer is at a -80 degrees from the horizon. This is the position that is used
for scanning a vertical wall on the left side of the fish. The PC is set up to display left channel only; the right
transducer output is ignored. The recommended Range setting on the PC is 10 m. The fish is towed 1-2 m
from the face of the wall. In most cases, the fish is just below the surface and is towed along the length of the
wall.
Left Transducer at +10 deg
Vertical
retaining wall
(side view)
Vertical wall Being Side
Scanned
boat hull
(end view)
nose end
nose end
Vertical wall Being Side
Scanned
Left Transducer at -80 deg
nose end
Vertical
retaining wall
(side view)
73
Boat Hull Being Side
Scanned