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?
A
Never. Contact may only be established using NB-DP circuits
B
When the ship is in excess of 300 gross tons
C
When the radio station license reflects authority for this type of operation and harmful interference is avoided
D
When it is known that the vessel does not have a selective ringing or calling device
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Question 1 / 20TVAnRTXLxQdRcGU8cfef
Question 1 of 20TVAnRTXLxQdRcGU8cfef
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?
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?