b. Direction of Fire
(1) A principal direction of fire is represented by a solid arrow. To prevent
confusion with similar symbols, the symbol representing a principal direction of
fire is always shown together with the appropriate weapon symbol.
(2) Symbols for sectors of fire and principal directions of fire are often
(3) A special principal direction of fire symbol is used to indicate final
protective lines. Heavily shaded portions along the principal direction of fire
symbol indicate areas of grazing fire.
he final protective line symbol is usually combined with the sector of fire and
(1) Point targets of less than 100 yards
(2) Linear targets