At once, quickly; unhesitatingly, vigorously.
Sticking up; (of hair, etc) standing up at a marked angle.
Held in front of the body, especially in an authoritative or aggressive way.
Positioned ready for immediate use.
Held with two hands as in "port arms", but carried well above the head. The high port is often the position taught for running (at the double) or charging.
Very rapidly.