A reefer container holds temperature for the ocean crossing. The compliance problems start on land. Between port discharge and warehouse delivery, your perishable cargo passes through FDA jurisdiction, and the agency expects documentation that most first-time importers don't have ready. Miss a temperature log or a sanitary transport record, and a $40,000 shipment of frozen shrimp sits in a detention yard while you scramble for paperwork.
FSMA Sanitary Transport Rule
The FDA's Food Safety Modernization Act changed how perishable cargo moves through the U.S. supply chain. The Sanitary Transportation of Human and Animal Food rule (21 CFR Part 1, Subpart O) puts compliance obligations on four parties: the shipper, the carrier, the loader, and the receiver. If you import perishable goods through PortMiami, you touch at least two of those roles.
The rule applies to shipments that require temperature control for safety. Fresh produce, frozen seafood, dairy, meat, and certain pharmaceuticals all fall under this requirement. Shelf-stable goods in reefer containers (some beverages, chocolate shipped cold to prevent melting) may not trigger FSMA obligations, but the FDA makes that determination, not the importer.
Temperature Logging Requirements
Every reefer container has a built-in temperature recorder. The unit logs internal air temperature at intervals (usually every 15-30 minutes) throughout the ocean voyage. That data download is your first line of defense during an FDA review.
The drayage leg adds a separate compliance layer. From the moment the container discharges at PortMiami to the moment it reaches your cold storage warehouse, someone needs to account for the temperature chain. A 45-minute drayage run from PortMiami to a Doral warehouse doesn't sound like enough time for temperature abuse. But a genset that runs out of fuel, a driver who unplugs the reefer unit during a chassis swap, or a 3-hour customs hold with the container sitting on hot asphalt can break the cold chain fast.
FDA inspectors reviewing perishable imports want to see an unbroken temperature record from origin to final destination. The ocean leg covers most of that timeline. The drayage leg is short but represents the highest-risk window because the container changes hands, moves between equipment, and sits exposed to Miami's 95°F summer heat.
Common Perishable Categories at Miami Ports
Miami handles more perishable imports than any other U.S. East Coast port. The proximity to Central America, South America, and the Caribbean makes PortMiami and Port Everglades the default entry points for fresh produce, seafood, and cut flowers. Each category has different temperature and compliance requirements.
Your customs broker files prior notice and entry paperwork. Your drayage carrier maintains the cold chain during the land move. Both roles need to coordinate, because an FDA hold at the port means the reefer container sits longer, the genset burns more fuel, and your warehouse appointment window slides.
Documentation Checklist for Reefer Imports
FDA doesn't accept "the container felt cold when we opened it" as compliance documentation. You need paper (or digital) records at every handoff point.
- Prior Notice Confirmation: FDA requires electronic prior notice before any food shipment arrives in the U.S. Your broker files this, and the confirmation number goes on the entry paperwork. Without it, the container doesn't clear.
- Temperature Download from Ocean Voyage: The shipping line provides a data logger download showing container temp throughout the voyage. Request this before the container discharges. Some lines charge $25-50 for the download.
- Written Temperature Specifications: A document you provide to the drayage carrier stating the required temperature range, acceptable deviation limits, and what to do if the reefer unit alarms. FSMA requires this in writing before transport begins.
- Driver Pre-Trip Temperature Log: The drayage driver's record of the reefer unit's temperature reading at port pickup. Include container number, date, time, and temp reading.
- Delivery Temperature Record: The warehouse receiver's documentation of temperature at delivery. Both parties should keep copies.
- Sanitary Transport Agreement: A written contract or agreement between you and the carrier covering equipment sanitation, temperature requirements, and recordkeeping obligations. FSMA requires this for covered shipments.
Keep these records for at least 12 months. FDA can request them during an audit or as part of a recall investigation. Digital records stored in a shared drive or TMS platform make retrieval faster than digging through a filing cabinet.
What Triggers an FDA Hold on Perishables
FDA doesn't inspect every perishable container. The agency targets shipments based on risk factors, import alerts, and random selection. But certain triggers increase your chances of a hold.
Missing or late prior notice. If the FDA's PNSI system doesn't have your prior notice confirmation before the vessel arrives, the container goes on hold. Brokers file prior notice 8-15 days before arrival for exactly this reason. Last-minute filings create delays.
Import alerts for your product or country. FDA maintains a public list of import alerts targeting specific products, manufacturers, and countries of origin. Shrimp from certain Southeast Asian processors, cheese from facilities with past violations, produce from farms flagged for salmonella. If your product appears on an active import alert, expect a physical exam on every shipment until the alert lifts.
Temperature abuse evidence. If the data logger shows a temp spike during the ocean voyage, FDA may hold the container for a food safety evaluation. A frozen seafood container that recorded 25°F for six hours during transit raises questions about product integrity. The carrier's data logger becomes evidence.
Labeling violations. Incorrect or missing nutrition labels, allergen declarations, or country-of-origin markings trigger holds. These aren't temperature issues, but they affect perishable imports because a labeling hold keeps your cold cargo sitting at the port while you correct the labels.
An FDA hold on a reefer container costs more than a hold on dry cargo. The reefer unit burns 8-12 gallons of diesel per day. A 5-day hold at $5.00/gallon adds $200-300 in fuel costs on top of the standard demurrage and exam fees. That's before counting the spoilage risk if the genset runs out of fuel over a weekend.
Carrier Responsibilities During Drayage
Your drayage carrier has specific FSMA obligations for perishable loads. Not every carrier in Miami handles reefer cargo. The ones that do should be able to explain their compliance procedures without checking with their office first.
Equipment sanitation. The carrier must ensure the trailer or chassis used for reefer transport is clean and free of contamination. For container drayage, the container itself arrives from overseas and the carrier pulls it on a chassis. The chassis and any equipment that contacts the container (twist locks, support structures) should be in sanitary condition. Carriers who also haul garbage or chemical containers on the same chassis fleet create cross-contamination risk.
Temperature maintenance. The driver must verify the reefer unit is running, set to the correct temperature, and fueled before leaving the port. If the unit alarms during transit, the driver contacts dispatch, and dispatch contacts you. The container doesn't get delivered to a warehouse with the reefer off unless someone makes that decision and documents why.
Recordkeeping. Carriers must retain records of temperature conditions, cleaning procedures, and any corrective actions for 12 months. If FDA asks your carrier for transport records and the carrier has nothing, the compliance failure falls on both parties.
Ask your carrier three questions before they haul your first reefer load: Do you have a written sanitary transport procedure? Do your drivers log pre-trip reefer temperatures? Can you produce transport records if FDA requests them? The answers tell you whether the carrier treats reefer compliance as real work or an afterthought.
Protecting Your Shipment
Build your documentation before the vessel arrives. Write your temperature specifications, draft the sanitary transport agreement with your carrier, and confirm your warehouse can document receiving temperatures. Scrambling to create these documents after the container hits the dock costs time you don't have when perishable cargo sits in Miami heat.
Choose a carrier with reefer experience. Not every drayage company in Miami handles temperature-controlled cargo well. A carrier that moves 50 reefer containers per month knows how to check genset fuel levels, read reefer unit alarms, and communicate temperature issues before they become food safety problems. A carrier that moves two reefer containers per month learns those lessons on your shipment.
Coordinate timing with your broker. FDA prior notice clearance, customs release, and reefer drayage scheduling all need to align. If customs clears at 4 PM but your carrier can't pick up until the next morning, the container sits overnight at the port on genset power. Make sure your broker communicates release timing to your carrier's dispatch so the driver is ready when the container clears.
Monitor import alerts for your products. The FDA's import alert database is public. Check it quarterly for your product categories, origin countries, and manufacturers. Knowing you're on an alert before your container arrives lets you prepare for exam delays instead of getting blindsided at the port.
Budget for reefer-specific costs. Genset fuel, temperature monitoring equipment, potential exam fees, and higher drayage rates for reefer moves all add to your landed cost. A reefer container from PortMiami to Doral costs $75-150 more than the same move with a dry container because of fuel, equipment, and the liability the carrier assumes for your cold chain.
Perishable imports through Miami reward preparation and punish improvisation. The FDA, USDA, and CBP all have jurisdiction over different parts of your cargo. Your customs broker handles the entry paperwork. Your drayage carrier handles the physical cold chain. You connect both and keep the documentation that proves everything went right. When it does, a reefer container clears PortMiami and reaches your warehouse in the same 2-3 hour window as dry cargo. When it doesn't, you're making phone calls from a parking lot while $40,000 worth of shrimp ticks toward its expiration date.