During MOPP level 2 Afloat, what should be staged?

MOPP (Mission Oriented Protective Posture) level 2 afloat requires specific measures to ensure personnel safety in a contaminated environment. At this level, staging decontamination supplies is essential because it enhances the ability to respond to a chemical, biological, radiological, or nuclear incident quickly. Having decon supplies readily accessible allows for swift action to mitigate the effects of contamination on personnel and equipment, preparing the crew for a potential threat without delay.

While overboots, individual protective equipment (IPE), and protective masks are also vital components of personal protection in contaminated environments, they are typically associated with different MOPP levels or are part of an individual's gear that should already be worn or ready before entering a hazardous area. In the context of MOPP level 2, the priority is on ensuring that resources for decontamination are pre-staged and readily available for immediate use, which is why decon supplies is the correct answer.