File: Tide.up.zip ... Direct
Includes a Tsunami Travel Time GUI to simplify wave arrival predictions.
A web application framework where "tide" releases are often distributed as source code zip files.
It is highly likely that refers to the compressed installation or data package for Tide Tool , an operational software developed by the Pacific Tsunami Warning Center for decoding and manipulating sea level data. Core Features of Tide Tool
Depending on where you encountered the file, it could also relate to:
Automatically identifies and labels the maximum and minimum sea level values on the displayed marigram. Other Potential Interpretations