Airman Certification Standards
ACS CA.IV.J
Glassy Water Approach and Landing (ASES, AMES)
Knowledge
A stabilized approach, including energy management concepts.
Effects of atmospheric conditions, including wind, on approach and landing performance.
When and why glassy water techniques are used.
How a glassy water approach and landing is executed.
Risk Management
Selection of approach path and touchdown area based on pilot capability, airplane performance and limitations, and available distance.
Water surface/condition.
Planning for a go-around and rejected landing.
Collision hazards.
Low altitude maneuvering, including stall, spin, or controlled flight into terrain (CFIT).
Distractions, task prioritization, loss of situational awareness, or disorientation.
Gear position in an amphibious airplane.
Skill
Complete the appropriate checklist(s).
Make radio calls as appropriate.
Scan the landing area for traffic and obstructions.
Select a proper approach and landing path considering the landing surface, visual attitude references, water depth, and collision hazards.
Establish the recommended approach and landing configuration, airspeed, and trim, and adjust pitch attitude and power as required to maintain a stabilized approach.
Maintain manufacturer’s published approach airspeed or in its absence not more than 1.3 VSO, ±5 knots.
Make smooth, timely, and correct power and control adjustments to maintain proper pitch attitude and rate of descent to touchdown.
Contact the water in a proper pitch attitude, and slow to idle taxi speed.
Maintain directional control throughout the approach and landing. 31
Retrieved from ecfr.gov on July 17, 2026.