Difference between FPLAN/TECH/MAN?
FPLAN: Cruise phase only. Uses user-entered airspeeds or calculates speeds based on time constraints
TECH: Used when engine out performance is confirmed. Provides ETE/ETA, bur no time control. Used for Direct To/Intercept Legs and as default when FPLAN speeds are selected, but none are manually entered and no time constraints exist.
MAN: Manually entered. Provides ETE/ETA, but no time control.