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 few other sites for confidence. Other maneuvers required during the lunar orbit phase are as shown on the figures. Since each of these maneuvers is described in the general mission description, they are not described in this paper.

Figure 4 shows the austere maneuver plan used for IMU alignment to illustrate how SM RCS propellants can be conserved if care is taken to preplan the maneuvers for maximum efficiency.

Figures 5 and 6 show the additional maneuvers requied to accomplish onboard navigation should the MSFN navigation loop fail.

Figure 7 describes the three LM rescue contingency stuations considered. The first two are associated with an on-time launch, and the third one with an anytime launch.

Characteristics of these situations will he discussed in another paper, but the point to be made here is that the LM rescue represents 180 to 300 pounds of the total 790 pounds available, which is 22% to 37% of the total even if the LM performs the docking. The anytime launch situation in which the CSM must perform the docking involves about 45% of the total. Therefore, it is vital to understand the detail requirements leading to such a contingency. These are currently under investigation.

Figure 8 presents the factors and calculations related to an RCS quad failure. The consequences of a quad failure are shown under "consequences". Propellants available after a quad failure are determined based on the equations shown under "calculations". (The second one infers good management to balance quads at all times.

The items under "checks" indicate that translation demands after a quad failure are significant, and has led to investigation of no ullage starts for the SPS with the LM rescue contingency.

Figure 9 shows the non-scheduled activities still under review.

Growth factors, of course, would be very significant. Additional safety factor considerations would only be identified as experience grows. Unevaluated factors are considered to be small.

In the case of the ROS activities, a thorough understanding of the maneuver requirements are required before they are