An RNP1 route designated with suffix Y indicates that for the route at or above FL200 and all turns shall be made within the allowable RNP tolerance of a tangential arc between the straight leg segments with a radius of:
a. 10 NM for turns between 30° and 90°.
b. 15 NM for turns between 30° and 90°.
c. 22.5 NM for turns between 30° and 90°.
d. 30 NM for turns between 30° and 90°.