Sonar Settings - Gemini 720is Product Manual

Seanet Pro Operation
The Gemini Sonar display is very similar to the standard Sonar display used for Tritech
International Ltd mechanical sonar heads such as SeaKing and SeaPrince. However, the
Gemini Sonar has a fixed scan sector of 120° and unlike the mechanical heads does not
have option for scan sector size and position adjustments. Therefore these function controls
have been omitted from the settings bar.

7.2.1. Sonar Settings

The Gain, Contrast and Range controls relate to C1 – C3 respectively on a Remote Access
Terminal (RAT). Function buttons F1 & F2 will become active whenever a multi-device or
multi-window application is selected from the Applications menu. These controls will
cycle through and maximise the device windows.
1. Application Tools Clicking on the tools icon on the left of the Sonar Settings Bar will
open the Application Tools menu
2. Application On, Off, Pause This doubles as a pause button and a status indicator.
Clicking on the button will pause the signals from sonar to Seanet Pro and pause the
screen from refreshing. Green indicates normal operation, red indicates the sonar is
paused and yellow shows sonar data from a log replay.
3. Sonar Gain (RAT: C1) sets the sonar receive gain as required – typically this is around
20% - 50% but is varied according to water and target conditions and user preference.
Document: 0703-SOM-00002, Issue: 1
Note
If a Gemini Narrow Beam Imager is connected then the scan size will
automatically update to 130°.
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Gemini 720is Imaging Sonar
© Tritech International Ltd.