Inside of a refrigerated container. A refrigerated container or reefer is an intermodal container (shipping container) used in intermodal freight transport that is refrigerated for the transportation of temperature sensitive cargo.he container is cooled for as long as there is frozen gas available in the system. These have been used in railcars for many years, providing up to 17 days temperature regulation. Whilst refrigerated containers are not common for air transport, total loss dry ice systems are usually used.
A keelboat is technically any sailboat with a keel âas opposed to a centerboard or daggerboard. In New Zealand the term keeler is frequently used as a generic alternative-meaning any sailboat with a keel, regardless of size.
Home > Resource Center > Tips for Renters > What Does a Keel Do? The graceful, sweeping lines of a sailboat above the waterline belie the very hard-working and functional part of the boat below the water â the keel. The word keel, which has Norse and Dutch roots, refers to either a structural or hydrodynamic component of a vessel. The information below describes the basic functions of sailboat keels. To ensure that the keel works as intended and that the ballast is in good shape, the condition of the keel should be checked regularly, either during a haul-out or in-water.