The Open Category and where the GVC fits

The UK CAA GVC (General VLOS Certificate) qualifies you to fly in the Specific Category under the PDRA01 or A2CofC-style operational authorisation, and it's the entry certificate most commercial pilots need once a drone or operation falls outside the simpler Open Category limits. If you only fly small, low-risk drones under Open Category rules, you don't need a GVC - but most professional work (surveying close to people, heavier aircraft, extended range) pushes you into Specific Category territory.

Open Category basics you must still know

• Three subcategories: A1 (fly over people, not assemblies), A2 (fly close to people, minimum 30m, or 5m in low-speed mode), A3 (fly far from people, minimum 150m from residential/commercial/industrial/recreational areas).
• Maximum height above the surface in Open and most Specific ops is 120m (400ft) unless your operational authorisation states otherwise.
• Drone classes C0-C4 determine which subcategory you can fly in; a drone with no class marking (legacy/privately built) is restricted to A3, or A1 if under 250g.

Specific Category and the GVC

• The GVC lets you self-declare or apply for an Operational Authorisation from the CAA, commonly using PDRA01 (Predefined Risk Assessment) which permits flight down to 50m horizontal distance from uninvolved people (30m if a low-speed mode is used, down to 5m for the aircraft itself in some setups).
• You must hold valid GVC certification plus an Operations Manual accepted by the CAA before flying commercially under most Specific Category authorisations.
• Your operating company (not just the individual) needs the Operational Authorisation - the GVC certifies the remote pilot's knowledge, the OA covers the organisation.

Registration and identification

• Every operator needs an Operator ID from the CAA, renewed annually, and it must be displayed on every drone over 250g (or any drone with a camera).
• Every remote pilot flying anything over 250g (or with a camera, other than a toy) needs a Flyer ID, gained by passing the free online theory test - separate from the GVC.

Airspace and no-fly rules

• Never fly within the flight restriction zone of a protected aerodrome without permission - typically a 5km radius plus extended strips along runway approach/departure paths.
• Avoid Restricted, Danger and Prohibited airspace, and always check NOTAMs before flying.
• You are legally responsible for the flight even when using automated or GPS-guided modes - the remote pilot in command must maintain the ability to intervene.

Common mistakes candidates make

• Confusing the Flyer ID (basic online test, no GVC needed) with the GVC (proper theory exam plus practical/Operations Manual for commercial Specific Category work).
• Forgetting that 120m is measured from the surface directly below the drone, not from the pilot's takeoff point on sloped terrain.
• Assuming A2 always allows 5m - the 5m low-speed exception only applies to drones with a genuine low-speed mode and is not automatic.

What is an Operations Manual?

An Operations Manual (OM) is the rulebook for how a drone operator runs their business safely.

It is a written document (or set of documents) covering the organisation, procedures, roles and responsibilities for every flight the operator conducts.

In the UK Specific Category, an OM is a mandatory part of an Operational Authorisation application to the CAA - you cannot get authorisation without one.

For the Open Category (A1/A2/A3, GVC not required for basic flying there) a formal CAA-approved OM is not required, but good operators still keep written procedures.

Why it matters for the GVC

The GVC (General VLOS Certificate) qualifies you to write and operate under an Operational Authorisation, which needs a bespoke OM matched to your specific operation.

Expect exam questions on what an OM must contain, who is responsible for it, and how it is kept current.

What the OM must cover

• Organisation details - the Accountable Manager (legally responsible for safety), Remote Pilots, and any Ground Crew/Observers, with named roles and responsibilities.
• Description of the UAS - make, model, weight, performance limits, and equipment fitted (e.g. FPV, parachute).
• Operating procedures - normal, abnormal and emergency procedures (loss of link, flyaway, fly-in-air collision avoidance, low battery, GPS loss).
• Risk assessment - the operation-specific risk assessment (linked to the SORA process) showing how risks are mitigated to an acceptable level.
• Maintenance schedule - inspection, maintenance and record-keeping for the aircraft and equipment.
• Training and competency records - how pilots are trained, assessed and kept current.
• Site-specific procedures - how each new operating site is assessed before flying (site survey).
• Incident and accident reporting - the process for reporting occurrences to the CAA (and Air Accidents Investigation Branch where relevant).
• Record-keeping - flight logs, maintenance logs, and how long records are retained.

Living document

The OM is not static - it must be reviewed and updated whenever procedures, equipment or the operation itself changes, and operators must keep it current with CAA requirements.

The Accountable Manager (or nominated person) signs it off and is responsible for ensuring staff work to it.

Common mistakes

• Thinking the OM is only needed once and never updated - it must evolve with the operation.
• Confusing the OM with the operational authorisation itself - the OM supports the application, it isn't the authorisation.
• Forgetting emergency procedures (loss of C2 link, flyaway, fire) must be explicit and rehearsed, not just implied.
• Assuming a generic template is enough - the OM must be tailored to the specific aircraft, sites and operations.
• Not keeping site surveys and flight logs alongside the OM as evidence procedures are actually followed.

Airspace classes you'll actually meet

Most UK drone flying happens in Class G (uncontrolled) airspace. Above and around airports you'll find controlled airspace - Class A, C, D and E - where drone flight usually needs permission from Air Traffic Control (ATC) before you enter.

Controlled Traffic Regions (CTRs) surround major airports from the surface up. Control Zones and the wider Transponder Mandatory Zones (TMZ) also restrict access. If your flight plan crosses into any of these, you must get ATC clearance first - normally arranged via the airport's drone desk or a NOTAM.

Reading a VFR chart

GVC candidates need to interpret a 1:500,000 UK VFR chart. Know your symbols:

• Blue zones = Controlled Airspace (CTR/CTA)
• Purple/magenta hatching = Restricted (R), Danger (D) or Prohibited (P) areas, each with a reference number
• Red circles = Aerodrome Traffic Zones (ATZ) - normally a 2 or 2.5 nautical mile radius circle, from the surface to 2,000ft above the highest fixed obstacle within it, centred on the longest runway
• Numbers in boxes show airspace base and ceiling in hundreds of feet (e.g. a box marked 35 means 3,500ft)

ATZ rules for drone pilots

An ATZ becomes active from 15 minutes before to 15 minutes after notified aerodrome hours. Flying a drone within the ATZ boundary, or above the ATZ up to 2,000ft, requires permission from the relevant ATC unit or aerodrome flight information service. This applies even under Open Category rules - the ATZ overrides your normal height limits.

NOTAMs

A NOTAM (Notice to Airmen) is a time-critical bulletin warning of hazards or changes: temporary restrictions, military activity, VIP movements, unlit obstacles, other drone activity nearby. Always check NOTAMs before every flight, not just once - they change daily. In the UK, check via the NATS AIS website or apps like Altitude Angel/Drone Assist which overlay live NOTAMs and restrictions on a map.

Common mistakes

• Confusing ATZ radius (2-2.5nm) with the separate FRZ (Flight Restriction Zone) around protected aerodromes, which is 5km
• Forgetting the ATZ applies to airspace above it too, not just the ground footprint
• Assuming Class G means 'no rules' - you still need permission for FRZs, Danger Areas and Prohibited Zones within it
• Checking NOTAMs once and not rechecking closer to the flight date/time
• Misreading chart altitude boxes - figures are in hundreds of feet, not thousands

Exam tip: expect chart-reading questions asking you to identify airspace type from a symbol, and scenario questions asking whether permission is needed for a given location and height.

Why weather matters for the GVC

Small unmanned aircraft are light and underpowered compared to manned aircraft, so they are far more sensitive to wind, gusts, and poor visibility. The GVC exam expects you to know both the meteorology theory and how it degrades drone performance and control.

Wind

Wind speed and direction affect groundspeed, battery endurance, and controllability.

• A headwind reduces groundspeed and increases flight time into wind; a tailwind does the opposite and can push the aircraft beyond safe recovery range.
• Most consumer and light commercial multirotors have a realistic safe operating limit of around 20-24 knots (roughly Beaufort force 5), though always check the manufacturer's stated maximum wind speed for your specific airframe.
• Gust factor matters as much as mean wind speed - a forecast of 15kt gusting 25kt should be treated as a 25kt flight.
• Wind generally increases with altitude and is affected by ground friction, so wind at 400ft can be noticeably stronger than at the surface.

Visibility and cloud

• VLOS (Visual Line of Sight) operations require the remote pilot to maintain unaided visual contact with the aircraft to comply with airspace and to avoid collisions - poor visibility such as haze, fog, or heavy rain can make this unsafe well before it becomes illegal.
• Low cloud base restricts operating height and increases risk of inadvertent entry into cloud, which is prohibited for VLOS flight.
• Precipitation (rain, snow) can damage electronics on non-weatherproofed aircraft and reduces both visibility and camera/sensor performance.

Temperature and density altitude

• Cold temperatures reduce battery chemistry efficiency, cutting flight time and increasing risk of a low-voltage cutoff.
• Hot, high-altitude, or humid conditions reduce air density, meaning the rotors generate less lift for the same power - this is 'density altitude' and it reduces payload capacity and climb performance.
• Sudden temperature drops can also cause condensation inside the airframe or camera housing.

Sources and pre-flight checks

• The Met Office aviation forecasts, NOTAMs, and apps built for drone pilots (giving wind at height, not just surface wind) are the standard references.
• Always check wind at operating altitude, not just ground-level wind reported by a weather app, as these can differ significantly.
• A written risk assessment should include a personal weather minima (e.g. maximum wind, minimum visibility, minimum cloud base) that you do not exceed regardless of mission pressure.

Common mistakes

• Relying on ground-level wind readings and ignoring wind at operating height.
• Ignoring gust factor and only checking mean wind speed.
• Forgetting that battery performance and therefore endurance drops significantly in cold weather.
• Treating VLOS as purely a distance limit rather than also a visibility/weather limit.

What SORA-lite actually is

For the GVC (General VLOS Certificate) you don't do a full SORA — that's for Specific category ops needing a full operational authorisation. What you DO need is a basic pre-flight risk assessment habit, built on the same logic SORA uses: identify the ground risk, identify the air risk, apply mitigations, then decide if the flight is safe to fly.

Ground risk — what's under the drone

Ground risk is about the chance of hurting someone if the drone comes down. Key drivers: the drone's mass and speed (kinetic energy on impact), and the population density of the overflown area.

• Sub-250g drones in the C0 class carry the lowest ground risk and can fly over people (but never over crowds) in the A1 subcategory.
• Heavier drones (C1, up to 900g) must avoid overflying uninvolved people where reasonably practicable.
• The A3 subcategory (drones without a class mark, or C2-C4) demands flying far from people: at least 150m horizontally from residential, commercial, industrial or recreational areas.
• A2 allows closer flight to uninvolved people — down to 30m normally, or 5m in low-speed mode — but only for C2-marked drones and only with the A2 CofC.

Air risk — what's around the drone

Air risk covers collision with other aircraft. Mitigations include: staying below 400ft AGL (the general limit, unless in specific airspace with permission), avoiding controlled airspace without clearance, keeping well clear of aerodromes (ATZ), and maintaining VLOS at all times so you can see and avoid manned aircraft.

Mitigations you must know

• Ground risk buffer: increase distance from people, reduce drone mass/speed, or fly in a more enclosed/controlled area.
• Air risk buffer: lower altitude near aerodromes, NOTAM checks, avoid restricted/danger areas, use a UTM/drone-awareness app before flying.
• Loss of control mitigation: pre-flight checks, battery checks, geofencing, return-to-home function.
• Human factors: never fly fatigued, impaired, or without a proper site survey — this is one of the most tested 'common mistake' areas.

Common mistakes

• Confusing full SORA (Specific category, formal authorisation) with the basic Open category risk thinking tested on the GVC.
• Forgetting that mitigations must match BOTH ground and air risk — students often only think about people below and forget airspace above.
• Assuming A2 30m/5m distances apply to any drone — they only apply to C2-class drones flown by an A2 CofC holder.
• Not doing a site-specific assessment (population, obstacles, airspace, weather) before every flight, treating risk assessment as a one-off box-tick rather than a live decision made each flight.

Reporting accidents and incidents

Any drone accident causing serious injury or death, or involving manned aircraft, must be reported to the police and the Air Accidents Investigation Branch (AAIB) immediately.

Other safety-related occurrences (near misses, loss of control, fly-aways) should be reported through the CAA's Mandatory Occurrence Reporting scheme (MOR / ECCAIRS) so lessons can be shared across the industry.

Keep a written record of any incident even if you decide it does not meet the reporting threshold - this protects you if questioned later.

In-flight emergencies

Every Operations Manual should define emergency procedures for common failures: loss of GPS, loss of control link (C2 link loss), low battery, flyaway and fire.

Most drones enter a pre-programmed failsafe on link loss - typically Return to Home (RTH) or land immediately. You must know your aircraft's specific failsafe behaviour before you fly it, not assume.

If a fly-away or loss of control happens near people, your priority is to warn bystanders and, where possible, steer the aircraft away from crowds and manned aircraft even if control is degraded.

Always plan flights with an emergency landing area in mind, away from people, roads and property.

Security

Drones and their controllers should be kept in your possession or securely stored to prevent theft, unauthorised use or tampering.

Be alert to the security risk of flying over or near sensitive sites - protests, VIP movements or critical national infrastructure can turn a routine flight into a security incident.

Protect your flight data and geo-location logs, especially where clients or sites are commercially sensitive.

Report any suspicious activity around your equipment or site to the police.

Maintenance

Follow the manufacturer's maintenance schedule exactly - firmware updates, battery health checks, propeller inspection and airframe integrity checks.

A pre-flight inspection is mandatory before every flight: check propellers for cracks, motors for play, battery charge and swelling, firmware version and compass calibration.

Lithium polymer (LiPo) batteries are a major fire risk. Store and charge them in a fire-resistant bag or box, never charge unattended, and never fly a swollen or damaged battery.

Keep a maintenance log recording inspections, repairs, firmware updates and battery cycle counts - this is essential evidence of due diligence if the CAA or an insurer ever asks.

A common mistake is treating maintenance as optional for 'toy-like' small drones - the same duty of care applies regardless of aircraft size.

Common exam traps

Don't confuse MOR (safety occurrence reporting to CAA) with AAIB reporting (serious injury/death or manned aircraft involvement) - they are different triggers with different recipients.

Remember RTH failsafe can itself cause a hazard if it flies back over an obstacle - always know your home point and RTH altitude before takeoff.