5
Data recording and playback
Logging and playback of data are controlled by VCR-
like buttons. While logging data, the user can enter
notes into the data. Two methods of user note entry
are provided. One prompts the user to enter a text
string; for example, entering a tunnel. The other
automatically enters a numbered note into the data-
base, minimizing interaction with the keyboard. A
summary of record and playback features are listed
below.
Record features
• user note
• pause/resume
• user-defined data set name
Playback features
• play forward
• play reverse
• step forward
• step reverse
• variable speed
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