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The labels containing information on the hatch's usage.

The cabin depress label, on the left, reads

CABIN DEPRESS
1. CABIN FAN (2) - OFF
2. PLSS O2 vlv - FILL
3. REPRESS O2 vlv - CLOSE (verf)
4. CAB PRESS REL vlv (2) - NORMAL
5. SIDE HATCH DUMP vlv - OPEN (O2) FLOW HI WARNING LT May Come On Prior To CABIN PRESS REG LOCK UP)[sic]
6. At 3.25 psia, SIDE HATCH DUMP vlv - CLOSE
7. O2 FLOW ind - LESS THEN[sic] 0.5 LB/HR
8. CABIN PRESS 3.25 psia
9. SUIT CKT PRESS STABLE 3.5-4.0
10. SIDE HATCH DUMP vlv - OPEN
11. CABIN PRESS ind - 0
12. SIDE HATCH DUMP vlv - CLOSE