The BBC News article Apollo in 50 Numbers; The Technology shows an image of the Saturn V's computer along with the caption:
The Saturn V's computer was probably the largest computer ever blasted into orbit (Credit: Nasa)
According to this answer we should really call this the Saturn V Instrument Unit.
I noticed three white cylinders pointed in different directions, each with a flat base. They remind me of helical antennas (with a plastic cover) that you would point at a satellite, but I don't know what those would be doing in this setting.
Question: What are these white cylindrical objects pointed in different directions in this photo of the Saturn V instrument unit?