Canopy Relative Work
What is Canopy Relative Work (CRW) ?
Canopy Relative Work (CRW) may be described as the intentional
maneuvering of two or more open parachute canopies in close proximity
to, or contact with one another during descent. The most basic
maneuver in CRW is the hooking up of two canopies, one below the
other. This formation, known as a "stack" or "plane"
(the difference between a stack and a plane is the grip on the
parachute), is the most common maneuver in CRW.
There are two major categories of CRW formations :
- Vertical formations : Canopies are either stacked or planed one beneath the other. All grips should be on the center cell.
- Off-set formations : one or more docks and grips are on end-cells. These formations include diamonds, boxes and stair-steps.
USPA BSRs recommends a beginner should have the following qualifications
before engaging in CRW :-
- At least 20 jumps on a ram-air canopy.
- Thorough knowledge of canopy flight characteristics, to include
riser maneuvers and an understanding of relative compatibility
of various canopies.
- Demonstrate accuracy capability of consistently landing within
five meters of a target.
Initial training would be conducted with
two jumpers - the beginner and an Instructor experienced in CRW.
The instructions should include lessons in basic docking and break-off
procedures as well as emergency procedures.
USPA BSRs has the following recommendations on equipment :-
- The following items are essential for safely doing CRW :
- hook knife -- necessary for resolving entanglements
- ankle protection -- adequate socks prevent abrasion from canopy
lines. If boots are used, cover any exposed metal hooks
- short bridle cords -- short, single attachment point bridle
cords are essential to reduce the danger of entanglement. Retracting
bridle pilot chute systems are desirable
- cross connectors -- are essential for building planes. The
should be connected between front and rear risers only.
- The following items are strongly recommended for safely doing
CRW :-
- altimeter -- provides altitude information for dock, abort
and entanglement decisions
- protective headgear -- must allow adequate hearing capability
for voice commands, in addition to collision protection
- soft toggles -- provide less possibility of entanglement than
hard toggles and better flight control
- trim tabs (go toggles) -- helpful for equalizing decent rates
and increasing control envelope
- cell crossporting (two rows) -- is recommended (when done
per manufacturer's specs) to minimize the likelihood of canopy
collapse
- cascades -- recommended to be removed from the two center
A lines.
Diamond Quest's equipment and safety recommendations for doing CRW
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Last modified : Monday, June 03, 1996 - 3:00:12 PM