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User interface
Top bar
Operating system functions
The operating system functions are located on the right side of the top bar. Minimize, Maximize/Normalize and Power Off are provided.

About this manual
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.
Simrad ST90
Operating procedures
Maintenance procedures
User interface
- User interface familiarization
  By default, the display presentation covers the entire screen. The display presentation provided by the ST90 system consists of specific visual elements that work together. The visual elements provide you with the echo information you need, they help you to control the functionality needed to understand this information, and finally, they allow you to control the operational parameters.
- Top bar
  - Top bar overview
    The top bar is located at the top of the display presentation and stretches from the far left to the far right. The top bar gives you fast access to key functionality and navigational information. It provides buttons for hiding and showing the menu, making screen captures, opening the Messages dialog box, and opening context-sensitive help. And more importantly, from the top bar you can see when data recording is active.
  - Logo and product name
    The brand logo and product name are shown on the left side of the top bar.
  - Menu
    Menu is located on the left side of the top bar. This is an "on/off" function.
  - Screen Recording
    The Screen Recording function allows you to record and save the echo presentation as a video file. Select Screen Recording on the top bar to start and stop the recording.
  - Screen Capture
    While using the ST90 system you may wish to make a screen capture to save an instantaneous copy of the current presentation.
  - Record
    A useful function of the ST90 system is it ability to record echo data. Use the raw data recording functionality provided by the ST90 system to save echo data using the *.raw format. You can save the data to the hard disk, or onto an external storage device. The data files can be played back on the ST90 system. The data files can later be deleted, copied or moved to another storage device.
  - Hull Unit
    Hull Unit is located on the left side of the top bar. Select it to open the Hull Unit Control dialog box.
  - Information panes overview
    The ST90 system offers several information panes to provide additional and detailed data from the presentations. The information panes are opened and closed from the top bar. The information panes are only available when an Inspection view is "active".
  - Navigational information
    The navigational information is located in the middle of the top bar. To choose which information to be displayed on the top bar, use the Top Bar functions in the Display Options dialog box. The Display Options dialog box is located on the Display menu.
  - Messages
    Messages is located on the right side of the top bar.
  - Help
    Help is located on the right side of the top bar.
  - Operating system functions
    The operating system functions are located on the right side of the top bar. Minimize, Maximize/Normalize and Power Off are provided.
- Replay bar description
  During replay, the dedicated replay bar is shown immediately under the top bar. The replay bar allows you to retrieve saved files, and to control the playback.
- Sonar views
- Using markers in the ST90 user interface
  Under normal use, the ST90 system presents several different echoes simultaneously. Some of these are clearly more interesting than others. It can be a challenging task to tell these echoes apart. It can also be hard to keep track of the different echoes as both echoes and your own vessel move. To ease the identification of these echoes you can use markers.
- Using target and position tracking
  The phrase target is used to identify an echo in the display presentation that you wish to act upon.The echo may be from a material item, a shallow, reef or rock, or from fish, fish schools or mammals.In most cases, the target will move and continuously change its position relative to your own vessel.You must decide which echoes that shall be classified as targets, and whether you shall start manual or automatic target tracking. A position track permits the ST90 system to automatically control the tilt and bearing based on the movements of your vessel.
- Informationpanes
- Bottom bar
  The bottom bar is located at the bottom of the display presentation and stretches from the left side to the right side. The tabs on the bottom bar allow you to choose presentation mode.
Menu system
Functions and dialog boxes
Concept descriptions
Technical specifications
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.
Datagram formats
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.
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Operating system functions

The operating system functions are located on the right side of the top bar. Minimize, Maximize/Normalize and Power Off are provided.

Minimize

Use this function to minimize the size of the application window. The application is only shown as a button on the operating system taskbar. Select the ST90 button on the operating system taskbar to restore the application window.

Maximize / Normalize

Use this function to change the size of the application window. To restore the window to its previous size, select it one more time.

Power Off

The Power Off dialog box offers two options. One is to turn off the entire system, the other is to only close the ST90 program.

Power Off: Power Off hoists the transducer, turns off the operating power to all units, closes the program, and then automatically turns off the Processor Unit.
Exit to Operating System: Exit to Operation System closes the ST90 program.