You are right Al, although I never made the distinction.
A3.0
flat welding position. The welding position used to weld
from the upper side of the joint at a point where the
weld axis is approximately horizontal, and the weld
face lies in an approximately horizontal plane. See Figures
B.16(A) through (C), B.17(A), B.18(A), B.19(A),
and B.20(A).
The referenced figures do however include the test positions (1F, 1G, etc.)
Do you mention this because there would be some problem inserting a simple 2F in the tail of a weld symbol if it were important for the weld to be completed in the horizontal position?
Seems like a straight forward way to communicate with more brevity than placing "flat welding position" in the tail of the fillet weld symbol when "1F" might provide the same information. Or am I missing something?