One successful orbiter would be worth dozens of successful Ranger TV impacters. Langley could provide the management within its present ceiling, if necessary, and was highly motivated to do so. The orbiter would be a new start and would probably have its share of unforeseen problems. The Apollo Program might plan a photo-reconnaissance mission capability. Contract award would await Congressional action on FY 1964 funds.
Retreat is therefore possible.
A new start could be absorbed if the Block V Ranger were dropped.