http://www.WestFloridaPHRF.orgPHRF Spin Base Buoy 141, RLC 138 155%
(163 would be -3)
Roller Headstay with cover +9
Vee Jay adjusted Buoy 150, RLC 147
PHRF Non Spn Buoy 171, RLC 168
(they have a magic and mystical way of applying non spin "offsets" in this case they add 21 ... but these offsets appear to follow a somewhat arbitrary formula.)