Cardigan Bay's 'danger zone' will be active again next week.
Testing has been carried out since Tuesday this week and will continue throughout next week off the coast of Cardigan Bay.
Releasing its weekly schedule, Qinetiq, who operate the Ministry of Defence Parc Aberporth site in Parcllyn has announced live firing will take place in Cardigan Bay all next week in the heart of the bay.
The highlighted area will be active between 9am and 4pm daily and will therefore be closed to shipping.
The Cardigan Bay danger area is used as a military testing and training area, with activities occurring daily including low flying aircraft, missile evaluation, laser firing and bombing.
Announcements are made over VHF radio at the start and end of activity.
There will be no activity over the weekend, however.
The danger area in the bay was established during the Second World War and covers 6,500 square kilometres of Cardigan Bay from sea level to unlimited height.
The advance warning notice adds: "If you are planning a trip into Cardigan Bay, it is recommended for your safety to consult the programme notice and contact Range Control on 01239 813480 or 01239 813760 or VHF Channel 11 or 16 for further advice.
"There will be someone available to take your enquiry by one of these contact methods whilst activity is taking place in the Danger Area and between 09:00 to 16:00 on working days.
"If you telephone outside of these hours, please leave a message and your call will be returned on the next working day.
"Please note that the programme is often subject to change at short notice and it may not always be possible to provide an updated schedule on our website and by email. Please telephone for latest information and advice.
"Remember for your own safety, and that of others, if you are planning to navigate through the Danger Area at any time, please familiarise yourself with the safety information which can be found on our website before entering the Danger Area.
"Any person who finds any metal object, such as projectile, shell or any unidentified explosive object or part of such object should immediately contact the Coastguard VHF Ch.16. For your own safety, do not touch or attempt to remove such objects."