Final answer:
When facing visible ice accretion, approach speed corrections can be found in the aircraft's flight manual or operating handbook, which will vary depending on the aircraft and conditions.
Step-by-step explanation:
When a pilot encounters visible ice accretion on the visual ice indicator, approach speed corrections can be found in the aircraft's flight manual or operating handbook. Typically, such corrections involve increasing the normal approach speed due to the aircraft’s degraded lifting capabilities caused by ice buildup. This is effectively a safety margin to account for the potential loss of lift and increase in drag. The exact value of the speed correction will vary based on the aircraft type, amount of ice accretion, and the particular conditions of the flight. It is crucial that pilots are trained to recognize icing conditions and know where to find the necessary information to make informed decisions to maintain flight safety.