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==== 가압 결합 어댑터 ====
{{본문|가압 결합 어댑터}}
[[가압 결합 어댑터]](PMA)는 [[공통 정박 장치]]를 [[우주 왕복선우주왕복선]]과 [[러시아 궤도 부분]]이 사용하는 [[양성 말단 부착 시스템]]([[APAS-95]])로 바꾸어 주어, 미국 궤도 부분의 도킹 포트 역할을 한다. 현재 PMA-1은 유니티 모듈과 [[자랴 모듈]]을 연결하는 데 쓰이고 있고, PMA-2와 PMA-3은 각각 하모니 모듈의 앞쪽과 천저 쪽에 위치한다. PMA-2는 우주왕복선이 주로 도킹하는 포트로 쓰였고, PMA-3는 예비용으로 존재하며 실제 사용된 적은 몇 번 없다.
미국 궤도 부분의 도킹 포트 역할을 한다.
The [[Pressurized Mating Adapter]]s (PMA) serve as docking ports on the USOS portion of the ISS. It converts the standard [[Common Berthing Mechanism]] to [[APAS-95]], the docking system that was used by the [[Space Shuttle]] and the [[Russian Orbital Segment]]. Currently PMA-1 is used to connect the ''Unity'' node with the [[Zarya (ISS module)|''Zarya'' module]] on the ISS. Pressurized Mating Adapter-2 is located on the forward end of ''Harmony'', while PMA-3 is located in the zenith port of the same node.<ref>[[Pressurized Mating Adapter]]</ref>{{Circular reference|date=July 2019}} PMA-2 was the main Shuttle docking port, with PMA-3 being its backup, used only a few times.
With the new Crew Commercial Program and the retirement of the Shuttle fleet, NASA built the [[International Docking Adapter]], to convert PMA-2 and PMA-3 to the [[NASA Docking System]]. IDA-1 was supposed to dock with PMA-2, but was lost in the [[SpaceX CRS-7]] launch failure. Thus IDA-2, which was brought by [[SpaceX CRS-9]] and was supposed to dock to PMA-3, was shifted to PMA-2. IDA-3, the replacement for the lost IDA-1, was launched in July 2019 on [[SpaceX CRS-18]] and was berthed to PMA-3.
PMA-1 and1과 PMA-22는 were1998년 delivered with the ''Unity'' node on12월 [[STS-88]] in임무에서 December유니티 1998모듈과 함께 정거장으로 운송되었다.<ref name="sts88" /> The third PMA-3은 was[[2000년]] delivered[[10월 by11일]] [[STS-92]] on October임무를 11,통해 2000옮겨졌다.<ref name="sts92">{{Cite web|url=http://www.shuttlepresskit.com/STS-92/|title=STS-92 Press Kit|accessdate=2012-02-06|publisher=NASA}}</ref>
== 외부 구조 ==
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