Simrad ER60, Operator'S Manual

Page: 35 / 182

Operational procedures
27
850-164692 / Rev.B
2 Place the second and third winches on the same vessel
side as the transducer and at equal distances from the
transverse section containing the transducer and first
winch.
WINCH 2 WINCH 3
WINCH 1
(C
D
481
/
GI
F)
Figure 3
Rigging a vessel
for sphere
calibration
Each winch must be provided with a long spool of 0.60 mm
diameter monofilament nylon line, which is marked with small
swivels at 5 m intervals, beginning 10 m from the loose end.
The purpose of the swivels is threefold:
•
to unravel rotation of the nylon line
•
to mark distances on the line
•
to add weight so that the line sinks in water
Attaching the sphere
1 Locate the rope pulled beneath the hull before anchoring.
2 Use this rope to pull the line from the first winch beneath
the hull to the side with the second and third winches.
3 Attach the appropriate sphere, with affixed loop, to the
three suspension lines.