CRW / CF: Canopy Relative Work Explained from A to Z

There's a moment above Empuriabrava you never forget. You've just opened your canopy at standard altitude, the sky is still full of color, and thirty meters below you see another canopy rising toward you — not descending, rising — because the pilot has braked almost to a stall to wait for you. It's your first CRW dock. The suspension lines intertwine with your partner's, your hands reach for the risers, every movement is surgical. Welcome to the most underrated and most technical discipline in modern skydiving.

Canopy relative work — CRW, or CF (canopy formation) in FAI and IPC terminology — is the branch of skydiving where the action shifts from freefall to canopy flight. Skydivers open at high altitude, often around 2,500 meters or above, to ensure sufficient working altitude under canopy, then maneuver their open canopies to build formations: sequences, rotations, diamonds, stacks. It feels almost closer to acrobatic paragliding than to freefly — but don't say that to a CRW dog, if you're attached to your teeth.

The History and Culture of CRW

CRW was born in the United States in the 1970s, almost in parallel with the development of high-performance rectangular canopies. Before that, with round parachutes, approaching another open canopy was an exercise in survival, not style. When ram-air canopies made canopy flight predictable and controllable, someone thought: what if we approached each other deliberately? American pioneers built the first formations, set the first records, and established the first safety procedures. In Europe, CRW found a natural home at large drop zones with wide skies and predictable winds — Empuriabrava in Spain became one of the world capitals, with boogies drawing teams from across the continent.

In Italy the discipline has remained a niche pursuit, practiced by a small core of specialists. Not because it's less interesting — those who know it consider it among the most technically complete disciplines — but because the learning curve is steep, dedicated equipment is expensive, and finding experienced flying partners to train with is harder than in freefly or FS. For a DZO or instructor looking to build a comprehensive training offering, however, understanding CRW is essential: skydivers who want to explore it will come, and they deserve competent answers.

How It Works: Physics and Basic Technique

A canopy in flight has both a vertical speed (sink rate) and a horizontal speed. The CRW pilot works both axes through the toggles and front risers. To close on a canopy below, they increase forward speed by releasing the brakes. To descend faster and close the vertical gap, they reduce braking. To slow down and hold position, they brake symmetrically to the edge of a stall. The dock — physical contact between canopies — typically happens when the upper pilot grabs the suspension lines or risers of the canopy below with their hands, or when their feet enter the fabric of the lower canopy (the so-called foot dock in stack formations).

The formation holds because the aerodynamic forces, when the canopies are correctly aligned and the pilots maintain the right tension, balance each other out. But that balance is dynamic, not static: any change in braking by one pilot propagates through the entire structure. In large formations — the CF world record, set in November 2025 at Lake Wales with 104 linked canopies, gives a sense of how far this discipline can scale — synchronization is comparable to that of an orchestra: every movement must be anticipated, communicated, and absorbed. A mistake by one pilot can destabilize the entire formation and create a complex emergency.

Equipment: What Changes Compared to Standard Skydiving

This is where a rigger must pay the closest attention. CRW requires specific equipment, and that's not a matter of aesthetic preference — it's a matter of survival. Canopies used in CRW are typically low-speed designs, with a less aggressive profile than swooping or freefly canopies. They must be stable at low speed, tolerant of braking variations, and — a critical detail — must have suspension lines that are resistant to entanglement: in CRW, lines intertwine deliberately, and they must be able to separate without knotting.

The RSL (Reserve Static Line) is a debated topic in CRW circles. In many advanced CRW configurations, the RSL is removed or modified: the risk of an inadvertent reserve deployment during a complex entanglement can outweigh the benefit. This decision must be made on a case-by-case basis, in consultation with the rigger and in accordance with the school's procedures — never by imitation. Similarly, MARD systems (such as the Skyhook) require careful evaluation: in a tangled-line situation, the logic of a MARD can produce unexpected sequences. There is no universal rule — only competent technical assessment.

An AAD remains strongly recommended, but here too the configuration should be discussed with the rigger: the standard activation altitudes of an AAD Expert or a Cypres Speed may not be optimal for a CRW jump conducted entirely below 2,000 meters. Some CRW practitioners use AADs with settings specific to canopy flight. Always verify with the manufacturer and the device manual before making any changes to the configuration.

Risk Profile: What a DZO or Instructor Needs to Know

CRW has a specific risk profile that is, in some respects, counterintuitive compared to other disciplines. The primary risk is not speed — in CRW you fly slow, not fast — but the complexity of emergency situations. An entanglement between two canopies can produce scenarios where none of the standard procedures apply directly: tangled lines can prevent a cutaway, the reserve can open into airspace already occupied by another canopy, and the altitude available to resolve the situation may be less than what is needed.

For this reason, CRW demands dedicated training that goes well beyond simply accumulating jumps. A skydiver with 500 freefly jumps who approaches CRW without specific training is a danger to themselves and to their fellow jumpers. The correct progression involves: familiarization with advanced canopy flight (precise piloting, thorough knowledge of one's own canopy's limits), specific training with an experienced CRW coach, and a gradual build from two-way formations to larger ones. There are no shortcuts, and a responsible DZO should not allow unqualified skydivers to participate in CRW jumps without supervision.

From a regulatory standpoint, the ENAC technical-operational regulations govern skydiving activity in Italy, including specialty disciplines. Anyone managing a drop zone or a CRW training program must verify the current version of the regulations on the ENAC website and consult the AeCI National Parachuting Commission for sporting and competitive matters. Do not rely on outdated versions of the regulations: periodic revisions can change requirements and procedures.

Competitive CRW: The FAI Format and IPC Disciplines

At the international level, canopy formation is governed by the IPC (International Parachuting Commission) within the FAI. The official competitive disciplines include sequential canopy formation (CF sequential) and rotation. Teams are judged on the speed at which they build prescribed formations, the precision of their transitions, and time management. The IPC CF World Championships represent the pinnacle of the discipline: four-way and eight-way formations reach levels of coordination that, from the outside, look impossible.

For an Italian team wishing to compete internationally, the pathway runs through AeCI (Aero Club d'Italia) for FAI sporting licenses and representation at federation competitions. National competitions, when organized, follow the calendar of the National Parachuting Commission. The number of Italian teams active in competitive CF has historically been limited, which makes every initiative to develop the discipline at the drop zone level all the more valuable.

For the Rigger: What to Check on CRW Equipment

If you're a rigger and someone brings you a rig to repack for CRW use, several checks need to be added to your standard routine. Suspension lines: inspect for wear specific to the contact points typical of a dock, not just at the ends. Canopy fabric: the areas contacted by other pilots' feet or hands show different wear patterns than a freefly canopy. Risers: in CRW they are loaded in unconventional ways during docks — check the integrity of the stitching and attachment points. The deployment system: openings in CRW often occur in turbulence generated by other canopies; a deployment bag that doesn't function perfectly can produce unstable openings at a critical moment.

The conversation with the equipment owner is an integral part of the job: a rigger who doesn't know the rig is being used for CRW cannot perform an adequate inspection. Always ask the right questions before opening the container.

In Summary: Why CRW Deserves Respect

I spent years building freefly jumps in Arizona and Dubai, pushing speed downward in head-down, chasing the perfect grip at 300 km/h. And then I watched a CRW team work an eight-way formation at Empuriabrava — with millimeter precision, at speeds that seemed almost motionless compared to what I was used to. It was another sport, with another grammar. Not slower — more complex. Not less dangerous — dangerous in a different way.

For those who work in professional skydiving — as instructors, Tandem Masters, riggers, or DZOs — knowing CRW doesn't necessarily mean practicing it. It means understanding its specific requirements, being able to recognize appropriate equipment, and being able to answer the questions of a skydiver who wants to approach the discipline with accurate information. It also means being able to say 'no, you're not ready yet' when necessary — and in our sport, that is always the most important skill of all.