Interpretation

At Red Bluff Muni (Red Bluff, CA), the VOR RWY 33 (AMDT 8B) instrument approach sets S-33 MDA 800 feet/HAT 488 feet for all categories and Cat C/D visibility 1 3/8, and adds a note that when the local altimeter setting is not received, pilots must use the RDD altimeter setting and increase all MDAs by 80 feet; increase S-33 Cat C/D visibility by 1/8 statute mile and circling Cat C/D visibility by 1/4 statute mile. Effective 2505081051 to 2705082359 EST.