Radiotelephone Procedures

Question 1

You receive an All Stations DSC Safety Call on 2187.5 kHz, you should

Answer 1

After receiving an All Stations DSC Safety Call on 2187.5 kHz, you should listen for the message on the (normally working) frequency specified in the DSC Call.

Question 2

V A designated DSC Distress Alert contains

Answer 2

The vital information contained in a designated DSC Distress Alert is ID, position and the nature of distress.

Question 3

After transmitting a MF DSC Safety Call, the RT call & message would typically be transmitted on

Answer 3

After transmitting a MF DSC Safety Call, the RT call & message would typically be tranmsitted on a simplex working frequency (like 2048kHz).

Question 4

After receiving a VHF DSC Distress Alert Relay from an MRCC, you should

Answer 4

After receiving a VHF DSC Distress Alert Relay from an MRCC you should listen for a MAYDAY RELAY message on Ch.16.

Question 5

The VHF channel for ship-to-ship RT communications relating to Safety of Navigation is

Answer 5

The VHF channel for ship-to-ship RT communications relating to Safety of Navigation is Ch.13.

Question 6

A VHF DSC Distress Alert should be sent on

Answer 6

By international agreement Ch.70 is the DSC VHF distress-alerting channel.

Question 7

After transmitting a VHF DSC Urgency Call, the RT call and message would normally be sent on

Answer 7

The ‘Pan Pan’ call and message would normally be sent on Ch 16 - though repetitions, updates and ‘long’ messages can be sent on a working channel.

Question 8

After transmitting a VHF DSC Safety Call, and preliminary RT call, a vessel would typically transmit the Safety message on

Answer 8

After transmitting a VHF DSC Safety Call (on Ch.70) and RT call (on Ch.16), the Safety message should normally be transmitted on on a working channel (e.g. Ch 06). Channels 15 and 70 are allocated for other uses, and Ch 16 should only be used if absolutely necessary.

Question 9

You receive an “All Stations” DSC Safety Call on Ch.70 VHF, you should

Answer 9

Safety ‘SECURITE’ messages should normally be sent on a working channel - though a preliminary voice call may also be sent on Ch 16 (for the benefit of non-SOLAS craft not fitted with DSC).

Question 10

The RT signal used by a control station to impose silence is

Answer 10

The signal SEELONCE MAYDAY indicates the control station is imposing silence.

Question 11

After receiving a DSC Distress Alert Relay from an MRCC on MF, you should

Answer 11

After receiving an MF DSC Distress Alert Relay from an MRCC you should listen for a MAYDAY RELAY message on 2182 kHz.