Ian Waugh - A Mariner\'s Guide to Marine Communications

Response Flowchart: (the flowchart is based on IMO COMSARlCirc.21
dated 25 January 2000, which seeks to reduce the number of erroneous
DSC Distress Acknowledgements and DSC Distress Relays)

DSC Distress Alert received on Ch 70

Listen on Ch Hi for 5 minutes I

Has the DSC Distress Alert,

or voice Distress Call/ Message

been ACKNOWLEDGED

by a Coast Station/MRCC, either bS

voice on Chl6 or bl DSC on Ch70.

(set note below)

Yes No

Is 'hour own vessel able to assist? Yes Is Distress Traffic

Noll -this is a decision for the in progress?

masUr It/he ves.rel, not any other

idge walchkuper

No Yes No

Yes

Acknowledge ~ voice to the Is the DSC Distress Alert

vessel in distress (or RCC) on Ch 16, e.g: continuing?

'M ayday JustinaJuslinaJustiTUl

This is Wkard Wi<:/lrd Wkard

Received Mayday'

No

Contact a Coast Station/MRCC (see nole 2 below)

and follow instructions from Casualty,

Coast Station/ M RCC or

On Scene Co-ordinator {OS C)

I Enter details in your Radio Log I

I Reset your DSC system

78 THE NAUTICAL INSTITUTE