Teledyne 440, System Manual, Page: 124 / 256

6 – Operating Procedure
6-20 © Teledyne TSS DPN 402196 Issue 4.1
❐ Details of any events, such as ROV collisions, that may have occurred during the survey, and
the effect that they may have had upon the survey. You should also record any corrective
action taken.
❐ Printed or hand-written sheets containing the System configuration details that were taken at
the start and at the end of the survey
❐ Background Noise Profile logged data
❐ Any other information requested by the survey planning team
6.3.8 Replay Logged Data
NOTE
You cannot use the display software on the SDC to replay externally logged files.
To replay a previously logged data file you have to select Open/Close Replay file [F2] from the file
option from within DeepView for Windows. This will provide you with the following dialog box to select
the file you require. The location of these files by default is a Logs folder within the DeepView for
Windows directory, but this can be changed by the user to another directory, or to a floppy disk in drive
A of the SDC.
❐ Externally logged data files include data packets of fixed length that supply all the information
required for a full analysis of the survey. The file includes target co-ordinates, signal values and
important quality control information generated by the 440 System during the survey. You should
use this logging method to generate the primary survey recording.
Externally logged files will usually be stored on a separate data logger along with files generated
by other items of survey equipment. See
section 6.4.1.1 "External Logging Format" on page 6-23
for a description of the external logging format.
❐ Internally logged files are of variable length and include all data transmitted to the SDC by the
SEP (target co-ordinates, signal values and, possibly, information needed by the Scope and Spec-
trum Analyser window). The data packets also include comment lines that describe the SEP type
and other System information, a time stamp and any text annotations supplied by the user.
NOTE
The internal logging format does NOT include the quality control information.
See section 6.4.1.2 "Internal Logging Format" on page 6-30 for a description of the internal logging
format.
NOTE
The internal logging facility is for test purposes and for the convenience of opera-
tors only. You should not use it to record the main survey log.