Explanation: Ship stations operating on VHF bridge-to-bridge channels like Channel 13 are primarily concerned with immediate navigation and safety. FCC regulations (specifically 47 CFR Part 80.953(a)) allow for more flexible identification in these scenarios. For routine communication, a ship station may identify by stating the name of the ship in lieu of the call sign. This allows for quick and unambiguous identification between vessels in close proximity, where recognizing a ship's name visually or aurally is often more practical and efficient than remembering a multi-character alphanumeric call sign. Option B is incorrect because while a call sign is part of a full identification, the regulation provides for using the ship's name *instead* of the call sign for routine bridge-to-bridge communications. Option C is incorrect as it implies both are always mandatory, which is not the case for bridge-to-bridge communications where the name suffices. Option D is entirely incorrect; all radio transmissions require identification, regardless of distance from shore, for accountability and regulatory purposes.