What condition occurs with a visual altimeter when it is in the jumper's burble?

When a visual altimeter is within a jumper's burble, it tends to read incorrectly. The burble is an area of disturbed air caused by the jumper's own body as they fall through the atmosphere. This turbulence can lead to fluctuations in air pressure around the altimeter, which relies on consistent atmospheric pressure to provide accurate readings of altitude.

As the jumper moves through this burble, the changes in pressure can cause the altimeter to react unevenly, which may lead to significant inaccuracies in the displayed altitude. This is particularly crucial for jumpers to understand, as relying on an inaccurate altimeter during critical phases of a jump could lead to miscalculations regarding altitude awareness, especially during deployment of the parachute. Understanding this interaction between the burble and altimeter function is important for jumpers to maintain safety and accuracy in their skydiving activities.