Transposition and Docking checklist (Standard)

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When it's possible, the original Apollo documentation is used for the checklists. Steps, which are not possible at the moment, are denoted in grey. Additionally there are checklists in Word file format in the Doc\Project Apollo - NASSP\Check List directory of your installation. Procedural steps in this section are presented in tabular form and in sequence they occure during the mission. The following is a detailed explanation of the columnar data presented in the tabulated lists:

Apollo 15 launch checklistA15_LAUNCH_CHECK
Time This column contains the mission time the procedure is to be done. Sometimes there's no fixed time when to do a procedure, in that case the time is left out.
Procedure The procedure is a group of steps or overall tasks involved in performing a complete function or operation. It often consists of controls the astronauts have to toggle or display readings that have to be checked. See CSM panels for more informations.
Panel The panel number of a particular switch or display for easier panel navigation.
Remarks Any useful comment. Please notice especially differences to the original function, bugs or other issues.

Now we are on the way to the moon, but still connected to the launch vehicle, the SIVB stage. Next we'll separate the CSM from the SIVB, turn around (Transposition), dock with the LM in the SIVB stage and extract it. After that you'll be in the so-called CSM/LM stack flying to the moon, while the remaining SIVB stage will go it's own way.

CSM separation

Time Procedure
Panel
Remarks
about 03:15:00
CSM separation preparation
 
cb DOCK PROBE (2) - close (verify)
DOCK PROBE EXTD/REL -
  RETRACT (verify)
 
SM RCS PRPLNT tb (8) -
  gray (verify)
 
Set Digital Event Timer (DET)
  to 59:30, stopped
FC REAC VLVS - LATCH
 
 
8
2
 
 
 
 
 
1
 
3

 

CSM separation
 
cb SECS LOGIC (2) - close (verify)
cb SECS ARM (2) - close (verify)
SECS LOGIC (2) - on (up) (verify)
SECS PYRO ARM (2) - ARM
Start DET
 
When DET shows 00:00
CSM/LV SEP pb -
  push, hold and release
 
SM RCS PRPLNT tb (8) -
  gray (verify)
SM RCS HELIUM tb (8) -
  gray (verify)
FC REAC VLVS - NORM
 
 
8
 
 
 
1
 
 
 
 
 
2
 
 
 
3










CSM separation

Transposition

The CSM is now separated from the SIVB and slowly moving away from it. That's fine, we don't need the SIVB anymore, but it still contains the LM we'll need to land on the moon. So we'll turn round (Transposition), dock with the LM, which is no longer covered by the CSM (Docking), and then extract the docked LM from the SIVB. This manoever was done manually and so we'll do it.

  • Switch to the left rendezvous window panel, use <CTRL><UP> and <CTRL><LEFT> when you look at the main panel. Don't scroll this panel if your screen resolution is too small, otherwise the COAS will not work properly.
  • After CSM separation you have full Orbiter-like control over the CSM via it's RCS thrusters, both rotational and translational mode. So switch to rotational and pitch up with about 5°/sec. until you did a 180° turn and look at the SIVB with the LM inside.
  • Engage the COAS (the arm with the "reticle") by clicking on it.
  • Now you can begin to move towards the LM by using linear thrust and to correct your attitude for docking. You are in correct position when the COAS directly points to the docking target (upside-down "T") on the LM and you don't see the red part of the docking target. This looks like this:
The LM docking target centered in the CSM COAS
  • When you are close enough the CSM docking probe automatically captures the LM (standard Orbiter docking behavior).

Docking

This is the Apollo 15 checklistA15_LAUNCH_CHECK starting shortly before capture of the LM, the grey lines indicate displays or controls which are not available at the moment, please ignore these steps.

Time Procedure
Panel
Remarks
 
 
 
 
 
 
 
 
 

 

LM extraction

Now you are docked to the LM, which is still attached to the SIVB. The last step is to extract the LM from the SIVB.

Time Procedure
Panel
Remarks
 
Pre LM separation & ejection
 
DET (Digital Event Timer) - RESET
cb SECS ARM (2) - close (verify)
SECS LOGIC (2) - on (up)
SECS PYRO ARM (2) - ARM
 
 
1
8
 

 

LM separation & ejection
 
SIVB/LM SEP - on (up)
Start DET
 
 
2
1



LM separation
Post LM ejection
 
SECS PYRO ARM (2) - SAFE
SECS LOGIC (2) - OFF
cb SECS ARM (2) - open
 
 
8
 
 

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  1. References

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