GVC and PDRA01: The Pre-Defined Risk Assessment Explained

What is a PDRA?

A Pre-Defined Risk Assessment (PDRA) is a ready-made risk assessment published by the Civil Aviation Authority (CAA) for a defined type of operation. Instead of building a full bespoke safety case, an operator whose planned flying matches the PDRA can apply using the conditions the CAA has already set out. This makes the application process more straightforward and predictable.

PDRA01 specifically

PDRA01 is the most widely used Pre-Defined Risk Assessment in the UK Specific Category. It covers a standard set of operating conditions intended for common managed-risk operations conducted within Visual Line of Sight (VLOS). Because the conditions are fixed and published, operators know in advance what limits they must work within.

When you operate under an Operational Authorisation based on PDRA01, you agree to follow those published conditions exactly. Stepping outside them would require a different authorisation or a bespoke safety case.

How the GVC connects to PDRA01

The General VLOS Certificate (GVC) is the pilot competency qualification required for PDRA01-based operations. The chain works like this:

1. You complete the GVC with a Recognised Assessment Entity (RAE), including theory, exam, practical assessment and an Operations Manual.
2. You apply to the CAA for an Operational Authorisation, citing PDRA01 as the basis of your operation.
3. If granted, you operate within the PDRA01 conditions.

The GVC demonstrates you have the knowledge and skill to operate safely under those conditions. Without it, you would not normally be able to obtain a PDRA01-based authorisation.

Why operators choose PDRA01

The main advantage of PDRA01 is simplicity. Because the risk assessment is pre-defined, the operator does not have to develop and justify a full bespoke safety case for many routine operations. This shortens the route to a lawful authorisation and reduces uncertainty.

• The conditions are clear and published in advance.
• The application process is more streamlined than a bespoke SORA submission.
• It suits many common commercial inspection and survey tasks.

When PDRA01 is not enough

If your intended operation falls outside the conditions of PDRA01 — for example, operations that require different separation distances or methods not covered by the pre-defined scope — you will need an alternative. That may mean another PDRA or a bespoke safety case built using the Specific Operations Risk Assessment (SORA) methodology. Either way, the GVC remains the underlying pilot competency.

Keeping it current

Both your GVC and your Operational Authorisation have validity periods and must be kept current. Always confirm the exact PDRA01 conditions in force against the latest CAA publications before you fly, as published guidance is updated from time to time.

Costs and timescales are noted as of May 2026 and vary between Recognised Assessment Entities. Confirm figures directly with the provider you choose.