Аннотация:MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 210317A ( Fermi GBM team, GCN 29659) errorbox 30510 sec after notice time and 30572 sec after trigger time at 2021-03-17 17:38:01 UT, with upper limit up to 18.2 mag. Observations started at twilight. The observations began at zenith distance = 46 deg. The sun altitude is -10.1 deg. The galactic latitude b = -7 deg., longitude l = 288 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1570432 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________| _____________________|__________ ___________|_____________________ _______________|_____|_______|___ ____|________ 30602 | 2021-03-17 17:38:01 | MASTER- SAAO | (10h 12m 01.88s , -63d 59m 59.4s) | C | 60 | 17.3 | 30682 | 2021-03-17 17:39:21 | MASTER-SAAO | (10h 20m 18.77s , -66d 00m 32.2s) | C | 60 | 17.5 | 30842 | 2021-03-17 17:42:00 | MASTER- SAAO | (10h 05m 27.61s , -62d 00m 11.5s) | C | 60 | 17.5 | 31081 | 2021-03-17 17:45:59 | MASTER-SAAO | (10h 30m 43.04s , -68d 00m 41.0s) | C | 60 | 18.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.