0 to 20 is from the 12 o'clock to 6 o'clock 20 to 60 is from 6 o'clock to a little before 9 60 to 120 is rest of the way to a little before 11 o'clock (11 o'clock is the 'off' position / 12 o'clock is the start)

Battery on the Depth Gauge is a Lithium Ion Battery - Lasts for 500 diving hours...when it is low, you can't use the depth gauge, it will just go to 12 o'clock position then back to off...Great Watch! Lovin' mine...Take Care, Craig