Measuring The Size Of A School Relative To The Purse Seine; Using Visual Aids During The Purse Seine Catch Phase - Simrad SN90 Operator's Manual

Measuring the size of a school relative to the purse seine

Estimating the size of a school can sometimes be challenging. A single circle marker can
be placed in the SN90 presentation. The circle is drawn with the same diameter as your
purse. By means of the circle you can see the size of the school relative to your purse.
Prerequisites
To provide an accurate visual presentation, the SN90 needs to know the size of your gear.
The function allows you to define the size of your trawl or purse seine. This
Fishing Gear
function is opened from the
Context
You can only add one circle marker to the SN90 presentation.
Procedure
1 Position the cursor where you wish to place the circle marker.
2 Press
Circle Marker
or:
Right-click and select
The size and location of the marker is defined by the choices you have made with
the
Fishing Gear
Further requirements
To delete the circle marker, press
select
Remove Circle Marker
Related topics
Using the markers and tracking features, page 71

Using visual aids during the purse seine catch phase

The gear symbol is provided as a tool to help you plan and shoot the purse seine. The
symbol is intended to be used in a structured sequence that starts when you plan to
shoot the purse seine.
Prerequisites
To provide an accurate visual presentation, the SN90 needs to know the size of your gear.
The function allows you to define the size of your trawl or purse seine. This
Fishing Gear
function is opened from the
381295/B
menu.
Setup
on the Operating Panel.
Place Circle Marker
function.
Circle Marker
on the shortcut menu.
menu.
Setup
Operating procedures
on the shortcut menu.
on the Operating Panel, or right-click to
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