Turning on the ST90 system

To use the ST90 system, you must first turn it on. To turn on the ST90 system use the Power button on the Operating Panel. The ST90 program starts automatically when the Processor Unit is turned on.

CAUTION:

You must never permit the ST90 system to transmit (ping) when the ship is in a dry dock. The transducer can be damaged if it transmits in the open air.

Procedure

  1. Make sure that you have sufficient water depth below the keel before you lower the transducer.
  2. Turn on the display(s).

    If required, refer to the instructions provided by the display manufacturer.

  3. On the Operating Panel, press Power, and keep it depressed for a few seconds.

    The blue indicator light in the button flashes while the Operating Panel establishes contact with the Processor Unit. When the connection has been made, the blue indicator light is lit permanently.

    Wait while the operating system and ST90 program is loaded and started. Both the Processor Unit and the Transceiver Unit are turned on automatically.

  4. Observe that the Transceiver On/Off dialog box opens automatically.

    The dialog box offers progress information. You can monitor the progress as the Transceiver Unit is turned on. A blue circle on the hull unit symbol means that the Processor Unit communicates with the hull unit control circuitry.

  5. Once the program has started, observe that the display presentation fills the entire screen.

    The program starts up using the same settings as the last time you used it. If these settings are acceptable, continue operation. If you wish to alter any of the settings, see the relevant procedures.

  6. Make sure that you have sufficient water depth below the keel before you lower the transducer.
  7. To lower the transducer, press Down on the Operating Panel.

    While the transducer is moving the indicator lamp flashes, and an audible signal is sounded. When the requested position has been reached, the indicator lamp is lit, and the audible signal stops.

    Alternatively, use the Hull Unit function on the top bar to lower the transducer.

  8. At the bottom of the Main menu, observe that the Operation icon is flashing.

    The icon is flashing to indicate that even if the ST90 system is turned on, "pinging" is disabled. The ST90 system is in Normal mode, but TX Power is set to Off to prevent transmissions. This is for safety reasons.

  9. Set Tx Power to Maximum (or any other power rating) to start pinging.