  High-dispersion echelle spectroscopy in optical forbidden lines of O^0, S^+,
and S^2+ is used to construct velocity-resolved images and electron density
maps of the inner region of the Orion nebula with a resolution of 10 km s-1 x
3" x 2". Among the objects and regions newly discovered in this study are (1)
the Diffuse Blue Layer: an extended layer of moderately blue-shifted,
low-density, low-ionization emission in the southeast region of the nebula; (2)
the Red Bay: a region to the east of the Trapezium where the usual correlation
between velocity and ionization potential is very weak, and where the emitting
layer is very thick; and (3) HH 873: a new redshifted jet to the southwest of
the Trapezium.
