How do we know the logger was not moved or tampered with inside the container during the voyage?

Each logger is secured with a tamper-evident adhesive mount and a numbered security seal, and the audit log records any attempt to connect to the device mid-voyage. The final report flags any mid-voyage data access events so the receiving quality team can assess whether the chain of custody remained intact.

Can one logger cover an entire reefer container or do we need multiple units?

For regulatory documentation purposes, a single logger placed at the warmest point of the container satisfies GDP requirements for a worst-case temperature record. For larger containers or shipments requiring spatial mapping, multiple loggers can be deployed and their data merged into a single multi-point voyage report.

What logging interval is recommended for a 30-day voyage to balance battery life and data resolution?

A 15-minute interval provides more than sufficient resolution to identify excursion events and their duration while keeping battery consumption well within the 90-day rated capacity. For voyages where port dwell time at hot intermediate ports is the main risk, a 10-minute interval during the first and last 48 hours can be pre-configured to capture higher-risk handling windows.