I use the TD to check the running depth of my dipseys and coppers through the day. I particularly like to send it down on a rod that is having more hits that the others to confirm depth and them check the others to see why they are not firing. It’s eye opening to check a dipsey on the port side and then check the starboard and see that they may be sometimes 15’or more difference in depth due to current or a crabwalking boat due to wind push. It happens even more often with coppers.