Which HF SITOR (NBDP) mode would be selected to receive MSI broadcasts from high seas shore stations?

(A). FEC

Other choices don't even make sense.

The FEC, or forward error correction, mode of broadcasting adds additional data to allow receiver to identify and correct errors without requesting the transmission again. The FEC mode is also called the channel coding mode.

Using FEC allows receiving data and provide information even when there is a radio noise or interference.

For more details, please see Wikipedia's article on Forward error correction

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The U.S. Coast Guard communications station providing HF MSI broadcast coverage for NAVAREA IV is:

(B). NMF

Just remember the answer.

More info on NAVAREA XII is from the National Geospatial-Intelligence Agency MARITIME SAFETY INFORMATION and
a great presentation with maps on IMO/IHO World-Wide Navigational Warning Service NAVAREA IV / XII

Overall info on MSI broadcasts on NOAA Marine Navigation site Marine Alerts, Advisories, and Warnings

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The U.S. Coast Guard communications station providing HF MSI (Maritime Safety Information) broadcast coverage for NAVAREA XII is:

(C). NMO (Honolulu)

Just remember the answer.

More info on NAVAREA XII is from the National Geospatial-Intelligence Agency MARITIME SAFETY INFORMATION and
a great presentation with maps on IMO/IHO World-Wide Navigational Warning Service NAVAREA IV / XII

Overall info on MSI broadcasts on NOAA Marine Navigation site Marine Alerts, Advisories, and Warnings

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Frequencies for receiving HF MSI (Maritime Safety Information) are:

(D). Specified HF SITOR (NBDP) frequencies

National Weather Service Marine Weather Broadcasts from the USCG

WORLDWIDE HF Radio-Telex Broadcasts HF Maritime Stations

For more info, US Coast Guard MARINE SAFETY INFORMATION BROADCASTS and
HF DISTRESS AND USCG CONTACT FREQUENCIES

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Which frequency/mode is authorized for use internationally for Maritime Safety Information transmissions?

(A). 4209.5 kHz using FEC mode

The 4209.5 kHz is 4.2095 MHz, which is within the HF range of 3 MHz to 30 MHz.

Please see Wikipedia article on List of Navtex stations Section 19 "Navtex on 4 MHz (4209.5 kHz)"

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How many frequencies are assigned specifically for HF MSI broadcasts?

(B). 8

Just remember the answer, like danger broadcasts being "behind the eight (8) ball," mnemonic.

For more info, US Coast Guard MARINE SAFETY INFORMATION BROADCASTS and
HF DISTRESS AND USCG CONTACT FREQUENCIES

National Weather Service Marine Weather Broadcasts from the USCG

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