Since daily inspection of the large numbers of refrigerated containers carried on board a vessel takes a significant time, a number of shipping companies have started to use systems which enable remote monitoring of the containers. Data is exchanged between the ship's computer and the containers over the power cable of the containers. This includes information about current temperatures, any alarms that have occurred etc. The printed logs that are generated as a result of this exchange can effectively replace manually recorded temperature data.
In addition, the crew is in a position to react to problems more quickly, since when relying on daily rounds it is possible that a container has had an alarm flagged for 24 hours before this is noticed.
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Figure 43:
Remote monitoring modem
in a refrigeration unit
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