TURTLE is JAGUAR's medium-wave station database, which is updated on a monthly basis. The TURTLE database itself is a standard text file named as "TURTLE-YYYY-MM.txt". By default, the JAGUAR installation package includes the default TURTLE to start with, but you can download the latest monthly database when needed. The TURTLE databases are saved in the TURTLE folder under the JAGUAR installation folder.
The TURTLE database is based on the MWLI data, with important added information on formats/slogans/networks for U.S./CAN stations. This added up-to-date information is crucial for NA DXers.
TURTLE is one of the cornerstones of JAGUAR: all the station locations on MAPS and logging functions are based on TURTLE.
The TURTLE window can be opened by pressing the keyboard key "T" or by clicking the SLIDER button. The size of the TURTLE window can be adjusted by dragging the SLIDER button up/down.
The default TURTLE database can be found in the full installation package but it can be out of date at the time of the installation. You can always upgrade your TURTLE by opening the TURTLE window and moving the mouse over the TURTLE database name: TURTLE and MORE buttons will appear.
Click the TURTLE button to see a small popup menu. Click "DOWNLOAD LATEST", and the latest TURTLE version will be downloaded and installed automatically as your current new TURTLE database.
Sometimes you may need to activate an older version of TURTLE. In that case, select "LOAD FROM DISK" on the popup menu. For example, if you are studying recordings from 2019-01, it is logical to use TURTLE-2019-01 instead of the latest TURTLE (or it is even better use TURTLE-2019-02, which contains the 2019-01 situation on the MW dial).
However, quite likely you don't have to load the TURTLE database manually very often, because JAGUAR V11 incorporates the "TURTLE AUTOLOADER" function: it tries to keep the database synchronized with the playback month (= "... AUTOLOADER ..." normally appears on the PLAYBAR when the playback month is changed).