We have 4 levels of automation.
Level one is hand flown / raw data/a-thr off.
Level two is handflown / a-thr / FD
level three is A/p / A-Thr / basic modes.
Level four is LNAV/VNAV/AP/ATHR
Pilots must be aware that consistent use and reliance on automation levels 3 and 4 throughout the flight regime will degrade basic flying skills. Therefore, pilots must continue to maintain proficiency by using all levels of automation on a regular basis, keeping in view the following:
§ Workload
§ Weather conditions
§ Fatigue factor
§ Traffic
§ Experience level of Flight Crew
§ In accordance with company policy and procedure.