A crevasse rescue course teaches you to avoid crevasse falls, and to get someone out when avoidance fails. Courses typically run as a single day with an IFMGA guide. While every guide teaches it slightly differently, the sequence covered is much the same.
Prevention. Reading a glacier for where crevasses run relative to the direction of flow, recognising a sagging snow bridge, and choosing a line.
Rope team travel. Tying in, spacing, keeping the rope taut without dragging your partner, knots in the rope on a two-person team, and the differences between travelling on foot and on ski.
Holding the fall. Arresting with a loaded rope, and what your first few seconds actually look like when the weight comes on.
Anchors. Ski anchors (in winter), snow bollards, deadman placements and ice screws where there is bare ice. Building them, backing them up, and loading one to see whether you would trust it.
Load transfer and escape. Getting the weight off your body and onto the anchor, then escaping the system. This is the step most people find hardest and the one worth the most practice.
Hauling. Preparing the lip so the rope does not cut into the snow, building a 3:1, and converting to a 6:1 when it will not move. Progress-capture devices — Micro Traxion, Tibloc, autoblocs — and how each behaves under load.
Self-rescue. Prusiking out under your own power, which is what you will need if you go in with a single partner above you.
Most courses finish with a full scenario run in real time. Not every course will go into an actual crevasse - it depends on the state of the glacier and the guide.
The Skyway runs year round, so unlike most venues in the massif the glacier here is reachable in any month.