Which of the following is NOT a DSC watch frequency?

(B). 2182.0 kHz

These are appropriate DSC watch frequencies 2187.5 kHz 2182.0 kHz 6312.0 kHz 12577.0 kHz

For more details, see US Coast Guard article, SPECIAL CONDITIONS AND PROCEDURES FOR DSC COMMUNICATION ON HF

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Which of the following channels and modes should be used when initiating a Distress alert transmission?

(C). Ch-70 DSC

For distress, safety, and other communications, the VHF DSC channel 70 is used.

For more details, please see US Coast Guard article, DSC PUBLIC CORRESPONDENCE

47 CFR 80.1069(a)(1) Sea area A1. An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available as defined by the International Maritime Organization.

For more details, see Code of Federal Regulations,
§ 80.1069 Maritime sea areas.

For Sea Area A1, which is inside of the radiotelephone coverage of VHF coast stations, a continuous DSC (ch70) is done, per directive of the IMO, or International Maritime Organization.

For more details, please see US Coast Guard's article on GMDSS AREAS AND SEARCH AND RESCUE AREAS

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How many total frequencies are available for DSC Distress alerting?
(D). Seven

For listing of the frequencies, please see US Coast Guard article, SPECIAL CONDITIONS AND PROCEDURES FOR DSC COMMUNICATION ON HF

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Which of the following watches must a compulsory Sea Area A1 vessel maintain?

(A). A continuous DSC watch on Ch-70.

47 CFR 80.1069(a)(1) Sea area A1. An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available as defined by the International Maritime Organization.

For more details, see Code of Federal Regulations,
§ 80.1069 Maritime sea areas.

For Sea Area A1, which is inside of the radiotelephone coverage of VHF coast stations, a continuous DSC (ch70) is done, per directive of the IMO, or International Maritime Organization.

For more details, please see US Coast Guard's article on GMDSS AREAS AND SEARCH AND RESCUE AREAS

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Which of the following are the MF/HF DSC Distress watch frequencies

(D). 2187.5 kHz or 2.1875 MHz,
  4207.5 kHz or 4.2075 MHz,
  6312.0 kHz or 6.3120 MHz
  8414.5 kHz or 8.4145 MHz
  12577.0 kHz or 12.5770 MHz
  16804.5 kHz or 16.8045 MHz

For more details, see US Coast Guard article, SPECIAL CONDITIONS AND PROCEDURES FOR DSC COMMUNICATION ON HF

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How many HF DSC Distress watch channels must be guarded by a compulsory vessel underway.

A. 2

47 CFR 80.1073(a) Ships must carry at least two persons holding GMDSS Radio Operator's Licenses as specified in § 13.7 of this chapter for distress and safety radio communications purposes. The GMDSS Radio Operator's License qualifies personnel as a GMDSS radio operator for the purposes of operating a GMDSS radio installation, including basic equipment adjustments. Reference

47 CFR 80.1071(c)(2) The ship remains within coverage of a VHF coast station and maintains a continuous watch on VHF Channel 16; or

47 CFR 80.1071(c)(3) The vessel remains within coverage of an MF coast station and maintains a continuous watch on 2182 kHz and VHF Channel 16.

47 CFR 80.1085(a)(2) A dedicated, non-scanning radio installation capable of maintaining a continuous DSC watch on VHF channel 70 which may be separate from, or combined with, that required by paragraph (a)(1)(i) of this section;

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