BSC2, IY adapter, HAM1, HAM2 and HAM3 have all viewports necessary for the full IFO.

BSC1 is good for HIFO but one viewport for CO2 laser should be installed in the future.

For video and illuminator viewports, no inspection was made except to confirm that something was installed.

For viewports that receive 1064nm and/or 532nm beam, we made a visual inspection to see the color of the surface, and all seemed to have some AR. No attempt was made to tell 1064/532 combo AR from so-called "high quality" optic (iLIGO 1064nm viewports?).

Thomas looked at oplev viewports and confirmed that they are the correct ones.

Following is a list of what is installed and what is not. Viewport numbers are based on https://dcc.ligo.org/T1000746.

BSC1 (IY): Illumination (G3), IY alternative video (G2), IY CP video (G11).

CO2 laser viewport (C0G5) is going to have to be installed in the future, but not this time.

BSC2 (BS): Oplev IN/OUT (G2), Video BS (G8), Illuminator (G9)

IY adapter A-1: Oplev IY OUT (VP1), IY Video (VP2), Oplev IY IN (VP4).

FTIMY-related viewports (VP3, 5B, 6) are not installed as we don't have H2.

HAM1: Video (A2F1) and Illuminator (A2F4) on the east door. IR PSL (A1F5), ALS green (A1F4) and POP/REFL (A1F3) on the west door.

HAM2: Faraday input video (A2F1), General video(A2F2), "IO trans mon & PRC MM mon beam" (A2F3), "IO trans mon & PRC MM mon beam" (A2F4), PRM video (A2F5) on the east door.

General video (A1F2), Illuminator (A1F1), MC1 Video (A1F3), MC REFL (A1F4), SM1 TRANS (A1F5) on the west door.

MC3 video (D7), Faraday output, SM1 and SM2 video (C1) and REFL parking (D8) on top.

It doesn't make sense that both A2F4 (left on the east door) and A2F3 (middle) are specified to use 1064/532nm combo viewport for the same purpose. There are two beams coming through SM2 (IM4) but both of them come out of A2F3.

A2F4 is valuable as a video viewport, so we can proceed with this configuration, but somebody needs to confirm my suspicion that VP800 is good enough for A2F3,  and then T1000746 should be updated.

HAM3: PR2 video (A2F3) on the east door. Illuminator (A1F3), MC2 Trans (A1F4) and MC2 Video (A1F5) on the west door.

WAMCA1 attachment by HAM2: PR2 Video (VP3), Oplev HAM3 in/out (VP7, not VP5 as specified by T1000746), Video MC2 (VP9).

WAMCB1 attachment by HAM3: MC3 video (VP3), Oplev HAM2 IN/OUT (VP5), Oplev PR3 IN (VP7), PRM Video (VP9), MC1 Video (VP10), Oplev PR3 out (VP11), PR3 Video (VP12).