The purpose of this publication is to provide the descriptions, procedures and detailed parameter explanations required to allow for safe and efficient use of the ST90 system. The publication also provides you with a thorough understanding of the parameters and adjustments provided by the ST90 system.
A position track permits the ST90 system to automatically control the tilt and bearing based on the movements of your vessel.
During normal operation, some echoes are clearly more interesting than others. In many situations specific echoes may be regarded as targets. To set up the ST90 system to provide such information, you can start target tracking.
One or more markers can be placed in the view to identify specific echoes. Each marker is shown as a small triangle with or without a short identifying label.
There are several ways to delete a single marker. You can use the shortcut menu, or select Delete in the Objects menu. You can also use the Operating Panel.
There are several ways to delete multiple markers simultaneously.
Estimating the size of a school can sometimes be challenging. A single circle marker can be placed in the display 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.
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.
When you have an echo you wish to track, the tracking functionality places a geographical area around the object. An invisible area - the tracking area - is created as an acquisition area. In order for the ST90 system to find and lock on the intended target, it needs to be kept within this tracking area. If the intended target falls outside the area, the tracking can not be started.
When you have an echo you wish to track, the tracking functionality places a geographical area around the object. An invisible area - the tracking area - is created as an acquisition area. In order for the ST90 system to find and lock on the intended target, it needs to be kept within this tracking area. If the intended target falls outside the area, the tracking can not be started. Use the Tracking Area Setup dialog box to define or change the physical size of the tracking area.
By defining the type of fishing gear you are using, the ST90 system may provide more accurate visual presentations. The Fishing Gear function allows you to define the size of your trawl or purse seine.
Use the Fishing Gear Setup dialog box to change the fishing gear properties to match your own equipment.
The technical specifications summarize the main functional and operational characteristics of the ST90 system. They also provide information related to power requirements, physical properties and environmental conditions.
The ST90 system can send and receive information to and from several different peripherals. All transmissions take place as datagrams with data sentences. Each datagram has a defined format and length.
