Some info for visiting Banff harbour can be found here: https://www.visitmyharbour.com/harbours/east-and-north-scotland/banff-harbour/

or

www.banffmarina.com

Banff is a secondary port to Aberdeen:

Charts AC 115, 222, 1462, 5617, Imray C23

Tides +0055 Dover, ML 2.0, Duration 06.15