What channel would you use to place a call to a shore telephone?

The correct choice is based on established maritime communication protocols. Channel 28 is designated for ship-to-shore communications. This channel facilitates voice communications with shore stations, which are essential for coordinating activities when a vessel is close to land.

Channel 16, while significant, primarily serves as the international distress and calling channel, commonly used to initiate communications but not specifically for direct shore calls. Channel 70 is used for Digital Selective Calling (DSC), which allows a vessel to send distress alerts or safety messages digitally rather than through voice. Channel 06 is typically utilized for inter-ship communication but does not specifically cater to calling shore facilities. Therefore, Channel 28 is the appropriate and designated channel for placing a call to a shore telephone, ensuring clear communication with shore-based entities.