Deck cargo. When goods are carried on deck ("deck carriage"), they are exposed to the weather conditions; sea spray and seawater shipped on board the vessel. The risk of loss or damage to the cargo is higher than if it was stowed "under-deck" within the cargo compartments and the carrier may wish to exclude or limit liability for loss or damage during carriage. The cargo interest and/or his insurers, on the other hand, may wish to be protected against loss or damage to cargo where deck carriage was not authorised. Sometimes deck carriage may be agreed between the shipper and the carrier because of the nature of the cargo, for example, a very large unit of cargo, such as a locomotive. It may also be an accepted manner of carrying the goods, as it is for containers.