A professional SIV (Simulation d'Incidents en Vol) course for a tandem pilot is not merely additional training—it is the line between being a "flight performer" and a "crisis manager." When you are in the air with a 200kg system and a passenger, any aerodynamic incident (collapse, rotation) can become critical within seconds. For a T2-level pilot, SIV is the guarantee that during a real threat, they will act not on raw instinct, but through a calculated algorithm.
Here is an in-depth analysis of this vital subject:
1. Managing Extreme Flight Modes Under Maximum Load
Unlike solo wings, a tandem paraglider is characterized by significantly higher inertia.
Dynamic Collapses (Asymmetric/Frontal): Under maximum wing loading (pilot + passenger), a collapse causes a much sharper dive and rotation. During an SIV course, the pilot learns how to maintain course and achieve an immediate reopening of the wing so that the passenger feels minimal discomfort.
Inertia Control: The pilot learns to manage the "pendulum" motion of the system. In tandem flying, the passenger's weight increases the amplitude of oscillations, which can be fatal if managed incorrectly.
2. Dynamics of 2-Liner and Professional Tandems
Modern high-performance (Professional/2-liner) tandems are faster and more efficient, but their reactions to incidents are much more aggressive.
Technical Complexity: In 2-liner systems (where there are only two rows of lines), controlling the wing near the stall point is different. The pilot must know how to use B-line steering effectively in a crisis.
Reaction Time: Professional wings are more sensitive to turbulence. An SIV course helps the pilot become "one with the wing," feeling even the slightest change in tension to prevent an incident before it even begins.
3. Safe Exit from a Spiral Dive with a Passenger
A steep spiral is the fastest way to lose altitude, but it is associated with high G-loading.
G-Force Management: In a tandem scenario, the pilot must account for the passenger's physical condition. During SIV, the pilot practices entering a spiral and, most importantly, achieving a gradual, safe exit to avoid an "over-the-top" surge of the system.
Anti-Spiral Prevention: Some tandems are prone to "locking" into a spiral (Neutral Stability). The pilot must know the specific techniques to force the wing out of this mode when it does not neutralize on its own.
Significance: Why is SIV the "Ultimate Guarantee of Safety"?
Muscle Memory: There is no time to think during turbulence. SIV develops automated reactions, allowing the pilot to maintain a "cold mind."
Passenger Trust: When a passenger sees that the pilot remains in full control even in difficult meteorological conditions, the risk of panic is neutralized.
Incident Prevention: An SIV-trained pilot recognizes potential threats in advance and prevents collapses from happening in the first place, which is the top priority for commercial flights.
Summary
An SIV course is an investment that grants the pilot a "superpower"—the ability to manage chaos. For a T2 certificate holder, this is not a luxury; it is an ethical and professional obligation toward the passenger.