What is the timeframe for calibration before a scheduled extended deployment of 60 days or more?

The correct timeframe for calibration before a scheduled extended deployment of 60 days or more is within 90 days prior. This requirement is rooted in ensuring that all equipment is functioning accurately and reliably before it is deployed in operational environments. Calibration helps to maintain the integrity and performance of instruments and systems, which is crucial for the safety and effectiveness of naval operations during extended deployments.

Having a 90-day window allows sufficient time to address any potential issues that may arise during calibration, as well as to accommodate any logistical challenges that could delay maintenance activities. This proactive approach is essential in maintaining operational readiness and minimizing the risk of equipment failure while deployed.

The other options do not provide adequate time for calibration, which could lead to complications during deployment. A shorter timeframe could potentially result in unresolved issues with equipment calibration that may affect mission capability.