Simrad SN90, Руководство оператора

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381295/B
71
Using the markers and tracking features
Topics
Starting a position track, page 71
Starting a target track, page 72
Placing a new marker, page 73
Deleting a marker, page 74
Measuring the size of a school relative to the purse seine, page 75
Using visual aids during the purse seine catch phase, page 75
Choosing the fishing gear in use, page 77
Changing the fishing gear properties to match your own equipment, page 78
Starting a position track
A position track permits the SN90 to automatically control the tilt and bearing based on
the movements of your vessel.
Context
The position track locks on a position defined by its latitude, longitude and depth.
The phrase position is used to identify a fixed echo in the SN90 presentation that
you wish to act upon. The echo may for example be from a shallow, reef or rock.
You must decide which echoes that shall be classified as positions, and whether
you shall start position tracking.
The bearing and tilt settings are automatically adjusted to compensate for the movements
of your vessel. The bearing line is automatically locked on the object to reflects its
bearing. The marker is stationary. If the echo moves in the SN90 presentation the
marker will not follow.
Tip
A new tracked object is automatically given priority status. Relevant information about
the priority object can be found in the lower left corner of the view. If you think the text
is small and hard to read, double-click on the text field. This will increase the text size.
Operating procedures