156.65 MHz, Channel 13 is the boat _________________ to ______________ frequency.

Channel 13, operating at a frequency of 156.65 MHz, is designated as a distress and calling frequency in the maritime communication system. This channel is primarily used for the initiation of distress calls and for making general communications to establish contact with other vessels or shore stations. The function of Channel 13 is to facilitate the coordination and notification procedures necessary for responding to emergencies on the water.

The distress aspect emphasizes its critical role in ensuring that vessels in peril can effectively communicate their urgent needs, while the calling element refers to its use for establishing initial contact before switching to another frequency for further communications. This channel operates under the regulations of the International Maritime Organization, which underscores its importance in maritime safety and coordination.

The other choices do not accurately represent the established purpose of Channel 13. Although there are channels designated for emergency response and internal communications, Channel 13’s specific role as a distress and calling frequency is essential for ensuring maritime safety.