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RoRo vs Container vs Flat Rack vs Breakbulk: Choosing the Right Shipping Method
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RoRo vs Container vs Flat Rack vs Breakbulk: Choosing the Right Shipping Method

The four ways to ship a vehicle or machine across an ocean, and a clear framework for choosing the cheapest safe option for your cargo and destination.

SPCT

Seaway Project Cargo Team

Project Cargo & Heavy-Lift Specialists

February 24, 20267 min read

Choosing the wrong shipping method is the most expensive mistake in heavy-equipment logistics. Here's a clear framework for the four options: RoRo, container, flat rack and breakbulk.

RoRo (Roll-on/Roll-off)

Cargo is driven or towed onto a dedicated vessel and secured on its wheels or tracks.

  • Best for: running, self-propelled, wheeled units — cars, trucks, wheel loaders, mobile cranes.
  • Pros: usually the most economical for eligible cargo; no container packing.
  • Cons: the unit must roll and steer; limited cargo protection; port availability varies.
  • Learn more: RoRo shipping service.

Container (standard, high-cube, or dismantled)

Cargo is loaded into an enclosed box — assembled if it fits, or knocked down if it doesn't.

  • Best for: parts, attachments, smaller machines, and anything that benefits from enclosed protection or more frequent sailings.
  • Pros: best protection; most sailings; easy inland moves.
  • Cons: size limits; possible dismantle/reassembly cost. Use the container space calculator to check fit.

Flat rack / open top

Specialized container equipment for out-of-gauge pieces, crane- or forklift-loaded and lashed down.

  • Best for: single over-width or over-height pieces that can't be knocked down to fit a box but don't need full breakbulk.
  • Pros: keeps the frequency and handling benefits of container service for OOG cargo.
  • Cons: more expensive than standard boxes; requires proper lashing and surveys.

Breakbulk (heavy-lift)

The piece is lifted aboard a general-cargo or heavy-lift ship by the ship's own cranes or a shore crane, then stowed in the hold or on deck, outside any container.

  • Best for: indivisible pieces too large or heavy for a flat rack: large mining trucks and shovels, crawler cranes that cannot be split further, transformers, boats and long structures.
  • Pros: practically no size limit; the piece moves whole, so there is no dismantling; heavy-lift ships can lift several hundred tonnes in one hook.
  • Cons: fewer sailings and fewer ports than container service; needs a lift plan, cradles or saddles and a survey; port handling takes longer.
  • Learn more: breakbulk ocean shipping.

A simple decision guide

QuestionIf yes
Does it run, roll, and steer?RoRo is likely cheapest
Does it fit (or knock down to fit) a box?Containerize
Is it a single over-gauge piece that can't be knocked down?Flat rack / open top
Is it indivisible and massive?Breakbulk heavy-lift

Still unsure? Send us the dimensions and destination and we'll model the options. Request a quote or check the route and sailings and import duty first.

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