Lucky escape after launching from AMS 01L in a BAC 1-11 years ago. Visibility was only CAT II on the ground, but the fog was patchy and 400-500ft thick with clear skies above.
Having reached 500agl and started the left turn to track the SPL (341?) radial, we popped out of the fog and immediately became aware of something in our way. What had started as a small speck rapidly became a flight of Canada Geese
in a lob-sided 'V' formation. Only by relaxing our LH turn did we avoid sending chunks of Goose and RR Spey down onto the unsuspecting folks fumbling around in the fog below. However, the subsequent shower of Goose poo was unavoidable!