The BH Altimount is a great solution for chest mounting a visual altimeter.

The BH Altimount is a carbon fiber slanted 'L' bracket that slip into the right hand ring cover or mudflap on the front of your skydiving harness and with 2 simple Velcro straps locks it in place so your altimeter is in the same place every time regardless of body position.

Height 5 1/2" - Width 3 1/2" - Depth 1 1/2"