Is it possible to turn on or off TLA100 transmitted messages (or PGNs)?

Yes, it is possible to turn on and off the TLA100 transmitted messages (or PGNs) using Maretron's DSM150, DSM200, or DSM250 display:

1. On the display, enter menu mode, scroll to "Configuration:" and press < Enter >
2. Scroll to "Device Configuration:" and press < Enter >
3. Scroll to the row containing the TLA100 and press < Enter >
4. Scroll to "NMEA 2000 PGN Enable/Disable..." and press < Enter >
5. You will see a list of PGNs that the TLA100 transmits. Scroll to the PGN that you want to turn on or off and press < Enter >
6. Use the < Up > or < Down > arrow keys to choose "On" or "Off" and press < Enter >