Editing Constitution Class (section)

===Transporter systems===

Extravehicular transporter to and from the ship was accomplished by a number of transporter systems, which allowed personnel or equipment to be transported over large ranges. The transporter platform featured six pads, which were numbered clockwise, beginning with the right front. A redesigned field generator matrix was mounted into the rear wall of the chamber aboard the refit configuration Constitution-class starships.

Aboard the refitted Constitution-class vessels, the transporter operator stood within an enclosed control pod, which had a floor-to-ceiling transparent aluminum panel through which he or she could view the transport platform. This panel served to shield the operator from the effects of any cumulative radiations emitted by the new transporter machinery, a side effect of the more powerful system.

A door in the standard transporter room wall led to a staging area where landing parties prepared for transporter.

Refit Constitution-class starships possessed a number of airlocks permitting direct physical access to the ship. One was located at the aft of Deck 1 on top of the saucer section. Two more were located in the lower saucer section, port and starboard, concealed by sliding hull plates. (Star Trek: The Motion Picture)

One of these, [port], is shown in the "Spock walk" sequence. Since nearly every other such airlock has a matching one on the other side of the ship, it is reasonable to assume the presence of one to starboard. 

These lower two are accessed through staging areas. Four spacesuit lockers line one wall; each containing one suit, providing enough to clothe a standard party of four. A small, locked arms cabinet held phasers; communicators, tricorders, translators, and outerwear were contained in a separate cabinet on another wall. (Star Trek: The Motion Picture)

The next set of airlocks were located on the port and starboard sides of the torpedo bays. The final set were located on the port and starboard sides of the secondary hull at the midline. (Star Trek: The Motion Picture; Star Trek II: The Wrath of Khan) These airlocks opened into the ship's main cargo bay. There was also a "gangway"-style airlock on the port edge of the saucer section. (Star Trek: The Motion Picture)

The presence of a similar "passageway" visible in the Tholian drydock holding the USS Defiant suggests that it is a feature of the pre-refit Constitution-class as well. (ENT: "In a Mirror, Darkly")

Located on the upper surface of the saucer section of the refitted Enterprise were numerous small hatches used for entrance/egress during extra-vehicular activities. (Kirk, Spock, Decker, McCoy, and the Ilia probe use one of these hatches to leave the ship when they arrive at V'Gers "core".) (Star Trek: The Motion Picture)