Triton Isis Bedienungsanleitung PDF herunterladen (Seite 147)

June 2004 Isis® Sonar User's Manual, Volume1

133

Definitions of terms used to describe the relationships of various distances

depicted in Figure 8-8 are:

Offset: a fixed value equal to the distance between the towpoint

and the navigation antenna or ship’s reference point,

entered manually.

Height of Towpoint: a fixed value equal to the height of the towpoint above

water level, entered manually.

Cable Out: a variable value equal to the amount of cable from the

towpoint to the towfish. The value can be acquired

automatically from a cable-counter device via a serial

port, or it can be entered manually by the operator.

Fish Depth: a variable value equal to the depth of the towfish. The

value can be acquired automatically from a fish-mounted

depth sensor via a serial port, or it can be entered

manually by the operator.

Layback: the total horizontal distance from the towfish to the

navigation antenna or vessel’s reference point. The

value can be acquired automatically from an external

navigation computer via a serial port; or it can be

calculated by Isis from

Offset, Height of towpoint,

Cable out and Fish Depth; or it can be manually input

by the operator.

8.7.1 Using the Layback Correction Dialog Box

Clicking View→Layback opens the Layback Correction dialog box

(Figure 8-9).

Chapter 8: Using the View Menu

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Triton Isis Bedienungsanleitung Seite 147