Safety zone
Several survey lines, downloaded from the TRINAV system are displayed as planned route.
Note that a survey area can include up to 1000 different survey lines.
MONITORING MODE
During survey operation, one survey line is selected as active in the TRINAV system, i.e for the
seismic calculation department.
It is important to display the same active route in ECDIS900. The active survey line has to be
manually selected by the navigator in ECDIS900 (In the dialogue Load \ Unload objects) and
then becomes the active route for ECDIS. The application calculates displays the XTE (Cross
Track Error) and the ETA to the end of the survey line.
SAFETY ZONE
The safety zone is an area defined around the streamers in which special alarms functions
apply.
ECDIS900 calculates in dynamic the safety area from:
• the position of the external cables
• the safety distance entered by the user in the text box ”Safety passage”.
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