Marine refrigeration must resist saltwater corrosion, shock, and vibration while holding temperature in high engine-room heat, far from service. Foster builds marine-rated walk-in coolers and freezers with corrosion-resistant panels, sealed foamed-in-place insulation (no wood to rot), and marine hardware — validated to MIL-S-901D shock, MIL-STD-167 vibration, and 2,000-hour salt spray, the same standards behind its Navy-approved units. Custom-built to fit any vessel from a yacht to a fishing boat.
Why marine refrigeration is a different animal
A walk-in in a restaurant sits still on a level floor in conditioned air. A walk-in at sea does none of that. It breathes salt air that corrodes ordinary steel and hardware, it rides a hull that flexes and slams in a seaway, it takes continuous vibration from engines and props, and it often sits next to an engine room where ambient temperatures punish the refrigeration. And when something fails, there is no contractor an hour away — the box has to keep holding through the voyage. Marine refrigeration is engineering for the worst case, every day.
That is exactly the problem Foster has solved since 1946. The construction that lets a Foster walk-in survive a Navy vessel — corrosion resistance, sealed insulation, reinforced fastening — is the same construction that keeps provisions cold on a yacht or a catch frozen on a fishing boat.
How Foster builds for the sea
- Corrosion resistance — galvanized and coated panels with marine-grade hardware, engineered against the salt air and spray that destroy ordinary refrigeration.
- Sealed, no-rot construction — foamed-in-place polyurethane insulation that will not wick moisture, and no wood anywhere in doors, frames, or floors to rot or delaminate.
- Shock & vibration tolerance — reinforced panel fastening and door hardware validated to MIL-S-901D shock and MIL-STD-167 vibration, so seams and seals hold underway.
- Salt-spray validated — construction tested to 2,000 hours of salt-spray exposure, the same regimen behind Foster's Navy-approved platform.
- Custom fit below deck — modular, foamed-in-place panels assemble in tight below-deck and engine-room-adjacent spaces a pre-built box could never reach.
- ±1°F hold in tough ambient — refrigeration specified to hold temperature reliably even in the heat near a running engine room.
Configure a marine build to your vessel's footprint in the quote builder, or send us the deck plan and we'll engineer the box around it.
At sea, the failure point is almost never the panels — it's the hardware, seals, and any material that can absorb moisture. Specify marine-grade corrosion resistance and sealed, wood-free construction from the start; retrofitting a land-spec box for salt life is a losing battle.
Vessels and operations we serve
Foster marine refrigeration serves recreational and commercial vessels alike: motor and sailing yachts, commercial fishing vessels needing catch-hold freezers, passenger and vehicle ferries, cruise and charter ships, and offshore oil and gas platforms where crews depend on reliable provision storage far from shore. Whatever floats it, if it needs cold storage that survives salt, shock, and vibration, it's the build Foster has shipped for nearly eight decades.
This page covers commercial and recreational marine. For U.S. Navy, MIL-spec, and shipboard defense refrigeration, see Foster's dedicated Navy & MIL-spec page — same platform, military configuration.
Frequently asked questions
What makes a walk-in cooler marine-rated?
It's built to survive what a land unit never sees: constant salt air and spray, a flexing hull, and continuous engine vibration. That means corrosion-resistant panels and hardware, sealed foamed-in-place insulation that won't absorb moisture, reinforced fastening for shock and vibration, and refrigeration tuned for high engine-room ambient heat. Foster builds to the same standards it supplies the Navy — MIL-S-901D shock, MIL-STD-167 vibration, and 2,000-hour salt spray.
Can you build a walk-in cooler for a yacht or fishing boat?
Yes. Foster custom-builds to fit a vessel's exact footprint — from a compact provision cooler on a yacht to a large catch-hold freezer on a fishing boat. Modular foamed-in-place panels assemble in tight below-deck spaces a pre-built box can't reach. Send the deck plan and access route and we engineer the box around it.
How does marine refrigeration handle saltwater corrosion?
Corrosion is the number-one killer of marine refrigeration. Foster fights it with corrosion-resistant galvanized and coated panels, marine-grade hardware, and sealed polyurethane insulation that won't wick moisture — with no wood anywhere to rot. It's validated by 2,000-hour salt-spray testing, the same regimen behind the Navy-approved units.
Do you supply refrigeration for ferries, cruise ships, and offshore rigs?
Yes. Beyond yachts and fishing vessels, Foster supplies galley and provision refrigeration for passenger ferries, cruise and charter ships, and offshore platforms — operations that need reliable cold storage in a punishing environment, far from any service call.
Is Foster marine refrigeration the same as its Navy units?
They share the same platform. Foster is a U.S. Navy approved supplier, and civilian marine walk-ins use the identical shock-, vibration-, and salt-resistant construction the Navy specifies, configured for a yacht, ferry, or fishing vessel. For strictly military applications, see the Navy & MIL-spec page.
Spec a walk-in built for the sea
Tell us the vessel, the space, and the access route, and the Foster team in Hudson, NY will engineer a marine-rated cooler or freezer around it — corrosion-, shock-, and vibration-resistant, built to the same standard as our Navy units. Since 1946.