Which of the following are typical duties of a Net Control Station?

A Net Control Station (NCS) plays a crucial role in managing communications within a net, which is a group of amateur radio operators who meet regularly to exchange information. One of the primary duties of the NCS is to call the net to order and direct communications between stations checking in. This includes ensuring orderliness, facilitating discussions, and maintaining effective communication flow.

While the other options may describe important responsibilities associated with net operations overall, the central and most defining duty of the NCS is actively managing these communications as described.

For example, although the choice regarding ensuring all stations are properly licensed is important for legal and procedural reasons, it is not the primary function of the NCS. Similarly, while selecting a meeting time and frequency might be handled by the NCS or a committee, it is not part of the daily operational duties.

Choosing "All these choices are correct" would suggest that all options are equal in importance to the role of a Net Control Station, which is not the case. The specific act of calling the net to order and directing communications is a distinctive and essential element of the NCS's responsibilities, making it the most relevant answer.