Explanation: To place a call to a shore telephone via marine VHF radio, you would use a Public Correspondence channel. Channel 28 (along with 26 and 27 in some areas) is specifically designated as a duplex public correspondence channel. This means it allows for simultaneous two-way conversation with a shore station that can then patch your call into the public switched telephone network, much like a regular phone call. The other options are incorrect: * **Ch-16** is the international distress, safety, and calling channel for initial contact, not extended telephone conversations. * **Ch-70** is dedicated exclusively to Digital Selective Calling (DSC) for automated calls and alerts, not voice communication. * **Ch-06** is an intership safety channel used for ship-to-ship communications.