The account has tools, equipment or materials that travel between sites.
Standard commercial property covers assets at a fixed location. Anything that moves — contractor's equipment, tools, mobile equipment, materials in transit — needs inland marine, which covers property in motion or off-premises.
It's a contractor with project materials and stored stock.
Builder's risk (a form of inland marine) covers projects under construction, including the structure, materials on site and in transit. It's the cover that fills the gap between project start and when the owner's property policy picks up.
It holds property belonging to others — bailees, repairers, processors.
If customer property sits in the insured's custody — jewellery being repaired, fine art being framed, computers being serviced — bailee's cover (an inland marine form) is what responds when something is lost or damaged.
It ships goods or holds cargo for others.
Motor truck cargo (for carriers) and shipper's interest (for owners) both sit in inland marine. Standard property and auto don't reach freight in transit — the cargo cover does.