Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Getting Started with Radar Radar/Chart Radar User Guide
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Operator Messages
The system generates messages that appear in order to either confirm an
action to proceed that the operator has requested, for example, when
switching from Transmit to Standby. Or a message to confirm an action that
the system is about to make, for example to acknowledge a change of own
ship's course on a monitored route.
Action Required Messages
If an Action Required message is confirming an
operator action the window will include an OK
button and a Cancel button. The action is
confirmed by clicking the OK button, or if the
action is to be cancelled the Cancel button is
clicked.
If the action requested by the operator cannot be
done, the system displays the reason for not
proceeding with the action and a confirmation (OK)
button.
While an Action Required is active the system
periodically sounds an audible indicator, which
may be muted by the operator, see Alert Buzzer.
Operator Messages
Operator messages are used to notify the users at all nodes about course
changes on a monitored route (see Monitor Route).
When an operator message is displayed, the buzzer is sounded briefly to
alert the operator to their presence. All Operator
Messages include an Acknowledge button.
If a message is not acknowledged after a period
of 30 seconds it is then escalated to an Alert.