Managing your
recency
requirements.
3in90 lets you do just that. For free.
Everything you need, and
just that.
Hang on, there’s more
more.
Substandard is not our only aviation tool.
Have a look.
Applying cold temperature
corrections.
Pilots are required to apply appropriate corrections to altitudes when temperatures are below ISA, so that the required clearance above terrain and obstacles are achieved.
SubStandard lets you track just that. For free.
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