When may a public coast station authorized to use high frequency narrow-band direct-printing (NB-DP) establish contact with a ship station using telegraphy?

Question

Accepted Answer

When the radio station license reflects authority for this type of operation and harmful interference is avoided

Answer

Never.  Contact may only be established using NB-DP circuits

Answer

When the ship is in excess of 300 gross tons

Answer

When it is known that the vessel does not have a selective ringing or calling device

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