GMDSS: DSC

If you are in an A1 sea area and receive a distress alert on channel 70 what is the procedure that you should follow?

If you are in area A1 (A1: This is an area with the radiotelephone coverage of at least one VHF coast station operating DSC equipment 30-40M range). A1: An area withing the range of at least one VHF coast station operating DSC equipment.

If you are in GMDSS sea area A1 and you receive a DSC distress alert on channel 70 you must:
1. Commence log keeping and inform the Master.
2. Set watch on channel 16.
3. Wait a short time for a coast station to acknowledge.
4. If they do not, acknowledge by radiotelephone, if there is no response to your radiotelephone acknowledgement and no working is heard, relay the information ashore by any means.
5. To avoid congestion on channel 70 in an A1 area, it is not advisable to DSC unless the alert keeps repeating.

So what would you do is the coast station did acknowledge?
commence log keeping and follow the relevant procedures for logging the call and logging the message and assist with the distress situation if required: Please read more of GMDSS: A User's Handbook.
To properly outline this procedure.