Which of the following modes of communications are available when using Inmarsat-C?

When using Inmarsat-C, the available modes of communication include telex and e-mail. This system is primarily designed for sending and receiving short messages through the use of a digital data service that supports these specific functions.

Inmarsat-C provides a robust service for maritime communication, allowing for reliable transmission of important messages, ensuring that users can effectively communicate while at sea. The telex service allows users to exchange messages in a manner similar to traditional telex systems, while the e-mail functionality ensures the ability to send and receive electronic messages, which is crucial for vessels that need to maintain contact with operators on land.

The other communication modes mentioned in the question are not features of Inmarsat-C. Fax reception is not typically supported by this system, which is designed for shorter data communications. Additionally, while it is important in the satellite communications context, Inmarsat-C does not offer voice transmissions; those features are available in other Inmarsat services like Inmarsat-F or Inmarsat-B. The transmission speed of 14400 BPS data is a characteristic of specific types of data transmissions, but does not define the capabilities offered in the context presented. Therefore, telex and e-mail stand as the correct modes of communication available with