Travelers' Information Stations (TIS), also called Highway Advisory Radio (HAR), are licensed low-powered non-commercial radio stations, used to broadcast information to the general public, including for motorists regarding travel, destinations of interest, and situations of imminent danger and emergencies. These are extremely interesting targets for DXers but very rare in the headphones, and because of the huge number of those stations in USA (over 2,300), they tend to fill TURTLE/NA MAP/LOCATOR/etc. in vain most of the time. This is why JAGUAR has moved these stations to a separate TIS database, available only on demand.
The TIS database is created automatically from each monthly TURTLE database and saved in the TURTLE folder with a name format of TURTLE-YYYY-MM-TIS.txt. The TIS databases cannot be opened with the standard "LOAD FROM DISK" function.
You can open the USA TIS database from DATABASE BAR: move the mouse cursor to the center area and click the USA TIS button.
You can also press ALT-T repeatedly to rotate TURTLE > USA TIS > CATBOOK > KOJE > MWLIST.