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Subelement D
DSC & Alpha-Numeric ID:
Section 21
Call Signs and SELCALs
A typical call sign for a large container ship under U. S. flag would be:
  • Correct Answer
    KBZY
  • WBX1469
  • NADN
  • KPH

A typical call sign for a large container ship under U. S. flag would be:

(A). KBZY

Just remember the answer.

United States merchant vessels are given call signs beginning with the letters "W" or "K"

ITU assigned KBA to KBZ for United States. Reference

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What would the number 1090 indicate?
  • A ship DSC MMSI number.
  • Correct Answer
    A coast station SITOR (NBDP) SELCAL number.
  • A coast station DSC MMSI number.
  • A ship station SITOR (NBDP) SELCAL number.

What would the number 1090 indicate?

(B). A coast station SITOR (NBDP) SELCAL number.

SELCALL NUMBERS:
Coast station – 4 digits
Ship station – 5 digits
Reference

For more info see Wikipedia's article on [SITOR][2]

For more info see Wikipedia's article on SITOR

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Which one of the following is a ship station SELCAL?
  • 1104
  • 1502352
  • Correct Answer
    11243
  • 0230364973

Which one of the following is a ship station SELCAL?

(C). 11243

Just remember the answer. It is the only one with 5 digits, and almost in numeric order.

The SELCAL, or selective user calling, works on HF and VHF frequencies. The SELCAL signal alerts to coming voice communication. Wikipedia SELCAL

For more info see Aviation Spectrum Resources pdf Selective Calling (SELCAL) Users Guide

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Which of the following is the call sign for a U.S.C.G. coast station?
  • NERK
  • KPH
  • WCC
  • Correct Answer
    NMN

Which of the following is the call sign for a U.S.C.G. coast station?

(D). NMN

The NMN call sign is for the U.S. Coast Guard Communication Station: USCG Communications Command, Chesapeake VA/NMN

Also for HF DSC, digital selective calling:
Portsmouth/NMN

For details, please see US Coast Guard article on
HF DISTRESS AND USCG CONTACT FREQUENCIES

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What type of station would be assigned the call sign WAB2174?
  • Correct Answer
    Tug boat
  • Container ship
  • Passenger ship
  • Bulk Tanker

What type of station would be assigned the call sign WAB2174?

(A). Tug boat

Just remember the answer.

United States merchant vessels are given call signs beginning with the letters "W" or "K"

ITU assigned WAA to WAZ for United States. Reference

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What number will a ship station use to identify itself using SITOR (NBDP)?
  • Four digit SELCAL.
  • Correct Answer
    Five digit SELCAL or 9 digit SELCAL number identical to MMSI.
  • 9 digit Inmarsat-B I. D. number.
  • 9 digit Inmarsat-C I.D. number.

What number will a ship station use to identify itself using SITOR (NBDP)?

(B). Five digit SELCAL or 9 digit SELCAL number identical to MMSI.

SEACAL uses 5-digit code, while MMSI uses 9-digit code, with the first three digits identifying the country.

SELCALL NUMBERS:
Coast station – 4 digits
Ship station – 5 digits
Reference

For more info see Wikipedia's article on SITOR

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