Minimum Ground Risk Buffer Distance

In plain language

When using a parachute recovery system, you must use at least the minimum Ground Risk Buffer distance required by regulations, keeping in mind that wind can drift the falling drone.

Requirement as structured

Operators must use the Ground Risk Buffer (GRB) distance defined in current regulations as the absolute minimum, taking into account potential wind drift if a Parachute Recovery System (PRS) is deployed.

Original regulatory text

Ground Risk Buffer (GRB) - where applicable, operators should consider the effect of PRS deployment after triggering the FTS. For example, it is possible that deployment of the PRS in the contingency volume can be affected by wind drift, resulting in the UAS landing beyond the GRB. Operators shall use GRB distance defined in extant regulation as the absolute minimum.