Which dialing sequence is valid for initiating an operator assisted ship-to-shore contact through a European Earth Station while tracking the AOR-E satellite?

To understand why the selected dialing sequence is valid for initiating an operator-assisted ship-to-shore contact through a European Earth Station while tracking the AOR-E satellite, it is important to recognize the standard format for such communications.

The dialing sequence begins with selecting the appropriate Land Earth Station (LES) by using a specific code that is designated for the satellite communication service. In this case, "012#" is the valid code for connecting to the European Earth Station. This selection opens the appropriate line to initiate the call.

Following the LES selection, the next part of the sequence is the actual telephone number you wish to reach. The number "1112024567890#" is formatted correctly for this type of communication, where the '#' is typically used to signal the end of the dialed number. This full number includes the necessary area code and ensures that the connection is made properly to the right destination.

Other sequences may not adhere to the correct protocols or formats for LES codes or telephone numbers, which would result in a failure to connect to the intended party. Therefore, the combination of the LES code and the appropriate phone number structure supports the reason why this specific choice is deemed valid.