It is possible to log event marks into a SEGY file written by SB-Logger and to display them with annotation both in SB-Interpreter and in SB-Logger.
NOTE
The SEGY format as published by the Society Of Exploration Geophysicists Link does not support the saving of event marks. There is no designated location for this parameter in the published format. Many sonar manufactures and software companies (including Triton Imaging) do however allow the saving of event marks in a SEGY file. Since the location is not standard it is very unlikely that the events will be displayed in either SB-Logger or SB-Interpreter unless the original SEGY data file was written by a Triton application (SB-Logger).
In the SEGY format Rev1 there are unassigned bytes available in the trace header from bytes 233-240, SB-Logger uses Bytes 237-238 for logging the event number, and bytes 239-240 to log the heading.
The event string must be sent via a dedicated port or as part of a custom navigation string. The serial parser is used to decode the data, see this link for more information on the serial parser and custom navigation strings. SB-Logger generates an event when the event number in the string changes. For example this string:
12345
12345
12346
12346
12346
12347
Would generate event 12346 and event 12347, a vertical line would be drawn on the display and the event number displayed.
Serial parser settings:
You must enable the display of events using the Lines and Colors tab in View>Preferences:
The default color for the event mark is blue.
If readable events are present in the data file they will be displayed as a blue line with the event number above, the display of events can be suppressed by unchecking the appropriate box in the Profile window Settings under the Annotation Tab:
