Quote from the Heliguys Site
Advanced Pilot Assistance Systems (APAS)
APAS is a brand new system incorporated in the Mavic Air to help pilots fly. Whilst the pilot moves the aircraft forwards or backwards with the controller, APAS detects and avoids upcoming obstacles by flying around or over them.
This is achieved by using all of the Mavic Air’s sensors and the application of flight path calculations to detect a clear flight path for the Mavic Air. If a clear path cannot be detected, the drone will hover in place until further instruction is given. If the Mavic Air has stopped, you won’t be able to fly any closer to the obstacle whilst still in the mode.
APAS works when flying forwards or backwards, giving users more freedom with their flight whilst removing the worry of a potential crash.
APAS is a useful system for new pilots and advanced pilots flying in complex environments such as woodland areas. APAS is available for all Mavic Air users but may not come as standard in the Mavic Air’s menu in the DJI GO 4 app. If not available, you must be select the option under the advanced menu options. Once enabled, the option will appear on the left side of the menu as seen below:
APAS on DJI GO 4
Please Note – In order to use APAS, the Mavic Air must be used with a dedicated remote controller.
This feature is a valued addition to a drone aimed at the consumer level. It can help new pilots learn how to fly and build confidence until the controls become second nature.
From testing out APAS in action, it’s worth noting that it is hypersensitive to obstacles and may stop the Mavic Air from moving even if you think you’re free from danger. This may be a hindrance to some shots but you can have peace of mind that your flight will be incident free. This is especially beneficial for pilots learning how to fly, especially around obstacles.