Can the CTU transmit when the container is below deck of a ship?
When the CTU is below deck of a vessel, the hatch cover blocks most transmissions and the satellite cannot reliably report status information. The CTU will record any events that took place when it was below deck and report them when it is discharged from the vessel hold. Because of the very limited access to a container when it is below deck and the fact that the cell guides restrict the opening of the doors, security below deck is typically not a concern. When it is loaded on deck of the vessel there is typically enough space between rows to allow “line of sight” of a satellite and it can provide status reports while underway.
